{"id":368051,"date":"2024-07-21T12:48:49","date_gmt":"2024-07-21T05:48:49","guid":{"rendered":"https:\/\/hoanghamobile.com\/tin-tuc\/?p=368051"},"modified":"2025-10-18T19:27:53","modified_gmt":"2025-10-18T12:27:53","slug":"trigger-la-gi","status":"publish","type":"post","link":"https:\/\/hoanghamobile.com\/tin-tuc\/trigger-la-gi\/","title":{"rendered":"Trigger l\u00e0 g\u00ec? Gi\u1ea3i m\u00e3 \u00fd ngh\u0129a trong m\u1ecdi l\u0129nh v\u1ef1c"},"content":{"rendered":"<p>B\u1ea1n c\u00f3 t\u1eebng nghe ai \u0111\u00f3 n\u00f3i &#8220;t\u00f4i b\u1ecb trigger&#8221; tr\u00ean m\u1ea1ng x\u00e3 h\u1ed9i, hay \u0111\u1ecdc t\u00e0i li\u1ec7u k\u1ef9 thu\u1eadt nh\u1eafc \u0111\u1ebfn &#8220;SQL trigger&#8221;? &#8220;Trigger&#8221; l\u00e0 m\u1ed9t t\u1eeb ti\u1ebfng Anh \u0111a ngh\u0129a, xu\u1ea5t hi\u1ec7n trong nhi\u1ec1u b\u1ed1i c\u1ea3nh t\u1eeb t\u00e2m l\u00fd h\u1ecdc, \u0111\u1eddi s\u1ed1ng h\u00e0ng ng\u00e0y \u0111\u1ebfn l\u1eadp tr\u00ecnh c\u01a1 s\u1edf d\u1eef li\u1ec7u. Vi\u1ec7c hi\u1ec3u sai ho\u1eb7c d\u00f9ng t\u1eeb n\u00e0y kh\u00f4ng \u0111\u00fang ng\u1eef c\u1ea3nh c\u00f3 th\u1ec3 d\u1eabn \u0111\u1ebfn nh\u1eefng hi\u1ec3u l\u1ea7m kh\u00f4ng \u0111\u00e1ng c\u00f3.<\/p>\n<p>V\u1eady ch\u00ednh x\u00e1c\u00a0<strong>trigger l\u00e0 g\u00ec<\/strong>? N\u00f3 mang \u00fd ngh\u0129a nh\u01b0 th\u1ebf n\u00e0o trong t\u1eebng l\u0129nh v\u1ef1c, v\u00e0 t\u1ea1i sao n\u00f3 l\u1ea1i tr\u1edf th\u00e0nh m\u1ed9t c\u00f4ng c\u1ee5 m\u1ea1nh m\u1ebd trong SQL? H\u00e3y c\u00f9ng Ho\u00e0ng H\u00e0 Mobile t\u00ecm hi\u1ec3u t\u1ea5t t\u1ea7n t\u1eadt v\u1ec1 thu\u1eadt ng\u1eef th\u00fa v\u1ecb n\u00e0y trong b\u00e0i vi\u1ebft d\u01b0\u1edbi \u0111\u00e2y!<\/p>\n<h2>Ngu\u1ed3n g\u1ed1c v\u00e0 \u00fd ngh\u0129a c\u01a1 b\u1ea3n c\u1ee7a Trigger<\/h2>\n<p>Theo ngh\u0129a g\u1ed1c, &#8220;trigger&#8221; trong ti\u1ebfng Anh c\u00f3 ngh\u0129a l\u00e0\u00a0<strong>&#8220;c\u00f2 s\u00fang&#8221;<\/strong>. \u0110\u00e2y l\u00e0 b\u1ed9 ph\u1eadn khi \u0111\u01b0\u1ee3c t\u00e1c \u0111\u1ed9ng s\u1ebd k\u00edch ho\u1ea1t m\u1ed9t c\u01a1 ch\u1ebf ho\u1ea1t \u0111\u1ed9ng c\u1ee7a s\u00fang. T\u1eeb \u00fd ngh\u0129a n\u00e0y, &#8220;trigger&#8221; \u0111\u01b0\u1ee3c m\u1edf r\u1ed9ng ra \u0111\u1ec3 ch\u1ec9 b\u1ea5t k\u1ef3 t\u00e1c nh\u00e2n n\u00e0o\u00a0<strong>g\u00e2y ra, k\u00edch ho\u1ea1t ho\u1eb7c kh\u1edfi \u0111\u1ea7u<\/strong>\u00a0m\u1ed9t chu\u1ed7i ph\u1ea3n \u1ee9ng ho\u1eb7c m\u1ed9t qu\u00e1 tr\u00ecnh n\u00e0o \u0111\u00f3.<\/p>\n<h2>Trigger trong t\u00e2m l\u00fd h\u1ecdc v\u00e0 \u0111\u1eddi s\u1ed1ng: Khi c\u1ea3m x\u00fac b\u1ecb &#8220;b\u00f3p c\u00f2&#8221;<\/h2>\n<p>\u0110\u00e2y l\u00e0 c\u00e1ch hi\u1ec3u ph\u1ed5 bi\u1ebfn nh\u1ea5t c\u1ee7a &#8220;trigger&#8221; tr\u00ean Internet hi\u1ec7n nay, \u0111\u1eb7c bi\u1ec7t trong c\u00e1c cu\u1ed9c th\u1ea3o lu\u1eadn v\u1ec1 s\u1ee9c kh\u1ecfe t\u00e2m th\u1ea7n. Trong t\u00e2m l\u00fd h\u1ecdc, trigger (t\u00e1c nh\u00e2n k\u00edch ho\u1ea1t) l\u00e0 b\u1ea5t c\u1ee9 \u0111i\u1ec1u g\u00ec \u2013 m\u1ed9t h\u00ecnh \u1ea3nh, \u00e2m thanh, m\u00f9i h\u01b0\u01a1ng, ho\u1eb7c m\u1ed9t t\u00ecnh hu\u1ed1ng \u2013 c\u00f3 th\u1ec3 g\u1ee3i l\u1ea1i k\u00fd \u1ee9c \u0111au bu\u1ed3n v\u1ec1 m\u1ed9t sang ch\u1ea5n t\u00e2m l\u00fd trong qu\u00e1 kh\u1ee9 (v\u00ed d\u1ee5 nh\u01b0 ng\u01b0\u1eddi m\u1eafc ch\u1ee9ng PTSD &#8211; R\u1ed1i lo\u1ea1n c\u0103ng th\u1eb3ng sau sang ch\u1ea5n).<\/p>\n<p>Khi m\u1ed9t ng\u01b0\u1eddi &#8220;b\u1ecb trigger&#8221;, h\u1ecd c\u00f3 th\u1ec3 tr\u1ea3i qua m\u1ed9t lo\u1ea1t c\u00e1c ph\u1ea3n \u1ee9ng c\u1ea3m x\u00fac m\u1ea1nh m\u1ebd v\u00e0 kh\u00f4ng ki\u1ec3m so\u00e1t \u0111\u01b0\u1ee3c nh\u01b0 ho\u1ea3ng s\u1ee3, t\u1ee9c gi\u1eadn, lo l\u1eafng, ho\u1eb7c c\u1ea3m gi\u00e1c s\u1ed1ng l\u1ea1i ch\u00ednh kho\u1ea3nh kh\u1eafc \u0111au th\u01b0\u01a1ng \u0111\u00f3.<\/p>\n<ul>\n<li><strong>Trigger Warning (C\u1ea3nh b\u00e1o n\u1ed9i dung nh\u1ea1y c\u1ea3m):<\/strong>\u00a0V\u00ec l\u00fd do n\u00e0y, b\u1ea1n th\u01b0\u1eddng th\u1ea5y c\u00e1c &#8220;trigger warning&#8221; (vi\u1ebft t\u1eaft l\u00e0 TW) ho\u1eb7c &#8220;content warning&#8221; (CW) \u0111\u01b0\u1ee3c \u0111\u1eb7t \u1edf \u0111\u1ea7u c\u00e1c b\u00e0i vi\u1ebft, video c\u00f3 ch\u1ee9a n\u1ed9i dung c\u00f3 th\u1ec3 g\u00e2y k\u00edch \u0111\u1ed9ng (b\u1ea1o l\u1ef1c, t\u1ef1 t\u1eed, l\u1ea1m d\u1ee5ng&#8230;).<\/li>\n<li><strong>S\u1ef1 l\u1ea1m d\u1ee5ng tr\u00ean m\u1ea1ng x\u00e3 h\u1ed9i:<\/strong>\u00a0Tuy nhi\u00ean, t\u1eeb &#8220;trigger&#8221; \u0111ang d\u1ea7n b\u1ecb t\u1ea7m th\u01b0\u1eddng h\u00f3a v\u00e0 s\u1eed d\u1ee5ng m\u1ed9t c\u00e1ch b\u1eeba b\u00e3i tr\u00ean m\u1ea1ng x\u00e3 h\u1ed9i \u0111\u1ec3 tr\u00eau ch\u1ecdc s\u1ef1 nh\u1ea1y c\u1ea3m c\u1ee7a ng\u01b0\u1eddi kh\u00e1c, ho\u1eb7c ch\u1ec9 \u0111\u01a1n gi\u1ea3n l\u00e0 \u0111\u1ec3 m\u00f4 t\u1ea3 c\u1ea3m gi\u00e1c kh\u00f3 ch\u1ecbu, b\u1ef1c m\u00ecnh th\u00f4ng th\u01b0\u1eddng.<\/li>\n<\/ul>\n<h2>Trigger l\u00e0 g\u00ec trong SQL?<\/h2>\n<p>Trong th\u1ebf gi\u1edbi l\u1eadp tr\u00ecnh v\u00e0 qu\u1ea3n tr\u1ecb c\u01a1 s\u1edf d\u1eef li\u1ec7u, &#8220;trigger&#8221; mang m\u1ed9t \u00fd ngh\u0129a k\u1ef9 thu\u1eadt nh\u01b0ng v\u1eabn gi\u1eef \u0111\u01b0\u1ee3c b\u1ea3n ch\u1ea5t &#8220;k\u00edch ho\u1ea1t&#8221; c\u1ee7a n\u00f3. C\u1ee5 th\u1ec3, Trigger trong SQL l\u00e0 m\u1ed9t\u00a0<strong>th\u1ee7 t\u1ee5c (stored procedure) \u0111\u1eb7c bi\u1ec7t<\/strong>\u00a0\u0111\u01b0\u1ee3c l\u1eadp tr\u00ecnh \u0111\u1ec3\u00a0<strong>t\u1ef1 \u0111\u1ed9ng th\u1ef1c thi<\/strong>\u00a0khi c\u00f3 m\u1ed9t s\u1ef1 ki\u1ec7n thay \u0111\u1ed5i d\u1eef li\u1ec7u (<code>INSERT<\/code>,\u00a0<code>UPDATE<\/code>, ho\u1eb7c\u00a0<code>DELETE<\/code>) x\u1ea3y ra tr\u00ean m\u1ed9t b\u1ea3ng c\u1ee5 th\u1ec3.<\/p>\n<p>H\u00e3y t\u01b0\u1edfng t\u01b0\u1ee3ng Trigger nh\u01b0 m\u1ed9t ng\u01b0\u1eddi b\u1ea3o v\u1ec7 t\u1ef1 \u0111\u1ed9ng: m\u1ed7i khi c\u00f3 ai \u0111\u00f3 c\u1ed1 g\u1eafng th\u00eam, s\u1eeda ho\u1eb7c x\u00f3a d\u1eef li\u1ec7u trong b\u1ea3ng, ng\u01b0\u1eddi b\u1ea3o v\u1ec7 n\u00e0y s\u1ebd \u0111\u01b0\u1ee3c &#8220;k\u00edch ho\u1ea1t&#8221; \u0111\u1ec3 ki\u1ec3m tra, ghi l\u1ea1i l\u1ecbch s\u1eed ho\u1eb7c th\u1ef1c hi\u1ec7n m\u1ed9t h\u00e0nh \u0111\u1ed9ng kh\u00e1c theo quy t\u1eafc \u0111\u00e3 \u0111\u1ecbnh s\u1eb5n.<\/p>\n<p style=\"text-align: center;\" data-sourcepos=\"3:1-3:72\"><picture><source srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2024\/07\/trigger-la-gi-1.jpg.webp 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2024\/07\/trigger-la-gi-1-300x169.jpg.webp 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2024\/07\/trigger-la-gi-1-768x432.jpg.webp 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" type=\"image\/webp\"><img fetchpriority=\"high\" decoding=\"async\" class=\"alignnone size-full wp-image-369049 webpexpress-processed\" src=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2024\/07\/trigger-la-gi-1.jpg\" alt=\"trigger-la-gi-y-cach-su-dung-trong-sql-1\" width=\"800\" height=\"450\" srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2024\/07\/trigger-la-gi-1.jpg 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2024\/07\/trigger-la-gi-1-300x169.jpg 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2024\/07\/trigger-la-gi-1-768x432.jpg 768w\" sizes=\"(max-width: 800px) 100vw, 800px\"><\/picture><\/p>\n<p data-sourcepos=\"20:1-20:24\"><em><strong>V\u00ed d\u1ee5 v\u1ec1 Trigger:\u00a0<\/strong><\/em>Gi\u1ea3 s\u1eed b\u1ea1n c\u00f3 m\u1ed9t b\u1ea3ng customers l\u01b0u tr\u1eef th\u00f4ng tin kh\u00e1ch h\u00e0ng. B\u1ea1n mu\u1ed1n \u0111\u1ea3m b\u1ea3o r\u1eb1ng t\u1ea5t c\u1ea3 kh\u00e1ch h\u00e0ng \u0111\u1ec1u c\u00f3 \u0111\u1ecba ch\u1ec9 email h\u1ee3p l\u1ec7. B\u1ea1n c\u00f3 th\u1ec3 t\u1ea1o Trigger sau \u0111\u1ec3 th\u1ef1c thi ki\u1ec3m tra n\u00e0y:<\/p>\n<blockquote>\n<p style=\"text-align: left;\" data-sourcepos=\"20:1-20:24\"><strong>CREATE<\/strong> <strong>OR<\/strong> REPLACE <strong>TRIGGER<\/strong> validate_email_address<\/p>\n<p style=\"text-align: left;\" data-sourcepos=\"20:1-20:24\">BEFORE <strong>INSERT OR<\/strong> UPDATE <strong>ON<\/strong> customers<\/p>\n<p style=\"text-align: left;\" data-sourcepos=\"20:1-20:24\"><strong>FOR EACH ROW<\/strong><\/p>\n<p style=\"text-align: left;\" data-sourcepos=\"20:1-20:24\"><strong>BEGIN <\/strong><\/p>\n<p style=\"text-align: left;\" data-sourcepos=\"20:1-20:24\">IF <strong>NOT<\/strong> REGEXP_LIKE(NEW.email, &#8216;[A-Za-z0-9._%+-]+@[A-Za-z0-9.-]+\\.[A-Za-z]{2,}&#8217;) <strong>THEN<\/strong><\/p>\n<p style=\"text-align: left;\" data-sourcepos=\"20:1-20:24\">RAISE_ERROR(&#8216;\u0110\u1ecba ch\u1ec9 email kh\u00f4ng h\u1ee3p l\u1ec7&#8217;);<\/p>\n<p style=\"text-align: left;\" data-sourcepos=\"20:1-20:24\"><strong>END<\/strong> IF;<\/p>\n<p style=\"text-align: left;\" data-sourcepos=\"20:1-20:24\"><strong>END<\/strong>;<\/p>\n<\/blockquote>\n<p data-sourcepos=\"35:1-35:336\"><em><strong>Gi\u1ea3i th\u00edch:<\/strong><\/em> Trigger n\u00e0y s\u1ebd \u0111\u01b0\u1ee3c th\u1ef1c thi tr\u01b0\u1edbc khi m\u1ed9t b\u1ea3n ghi m\u1edbi \u0111\u01b0\u1ee3c th\u00eam v\u00e0o b\u1ea3ng <strong><em>customers<\/em> <\/strong>ho\u1eb7c tr\u01b0\u1edbc khi m\u1ed9t b\u1ea3n ghi hi\u1ec7n c\u00f3 trong b\u1ea3ng <strong><em>customers<\/em> <\/strong>\u0111\u01b0\u1ee3c c\u1eadp nh\u1eadt. Trigger s\u1ebd ki\u1ec3m tra xem \u0111\u1ecba ch\u1ec9 email c\u1ee7a kh\u00e1ch h\u00e0ng c\u00f3 h\u1ee3p l\u1ec7 hay kh\u00f4ng. N\u1ebfu \u0111\u1ecba ch\u1ec9 email kh\u00f4ng h\u1ee3p l\u1ec7, trigger s\u1ebd t\u1ea1o ra m\u1ed9t l\u1ed7i v\u00e0 ng\u0103n ch\u1eb7n vi\u1ec7c th\u00eam ho\u1eb7c c\u1eadp nh\u1eadt b\u1ea3n ghi.<\/p>\n<h2 data-sourcepos=\"9:1-9:145\">C\u00e1ch th\u1ee9c ho\u1ea1t \u0111\u1ed9ng c\u1ee7a m\u1ed9t Trigger l\u00e0 g\u00ec?<\/h2>\n<p data-sourcepos=\"3:1-3:173\">\u0110\u1ec3 gi\u00fap b\u1ea1n hi\u1ec3u r\u00f5 h\u01a1n v\u1ec1 c\u00e1ch th\u1ee9c ho\u1ea1t \u0111\u1ed9ng c\u1ee7a Trigger, ch\u00fang t\u00f4i s\u1ebd gi\u1ea3i th\u00edch chi ti\u1ebft t\u1eebng y\u1ebfu t\u1ed1:<\/p>\n<p data-sourcepos=\"5:1-5:25\"><strong>S\u1ef1 ki\u1ec7n k\u00edch ho\u1ea1t: <\/strong>S\u1ef1 ki\u1ec7n k\u00edch ho\u1ea1t l\u00e0 s\u1ef1 ki\u1ec7n c\u1ee5 th\u1ec3 trong c\u01a1 s\u1edf d\u1eef li\u1ec7u s\u1ebd g\u00e2y ra vi\u1ec7c k\u00edch ho\u1ea1t Trigger. C\u00e1c s\u1ef1 ki\u1ec7n k\u00edch ho\u1ea1t ph\u1ed5 bi\u1ebfn g\u1ed3m:<\/p>\n<ul data-sourcepos=\"9:1-11:13\">\n<li data-sourcepos=\"9:1-9:53\"><strong>INSERT:<\/strong> Khi m\u1ed9t b\u1ea3n ghi m\u1edbi \u0111\u01b0\u1ee3c th\u00eam v\u00e0o b\u1ea3ng.<\/li>\n<li data-sourcepos=\"10:1-10:63\"><strong>UPDATE:<\/strong> Khi m\u1ed9t b\u1ea3n ghi hi\u1ec7n c\u00f3 trong b\u1ea3ng \u0111\u01b0\u1ee3c thay \u0111\u1ed5i.<\/li>\n<li data-sourcepos=\"11:1-11:13\"><strong>DELETE:<\/strong> Khi m\u1ed9t b\u1ea3n ghi hi\u1ec7n c\u00f3 trong b\u1ea3ng b\u1ecb x\u00f3a.<\/li>\n<li data-sourcepos=\"12:1-13:0\"><strong>DDL (Data Definition Language):<\/strong> Khi c\u00f3 thay \u0111\u1ed5i \u0111\u1ed1i v\u1edbi c\u1ea5u tr\u00fac c\u01a1 s\u1edf d\u1eef li\u1ec7u, nh\u01b0 t\u1ea1o ho\u1eb7c x\u00f3a b\u1ea3ng.<\/li>\n<\/ul>\n<p data-sourcepos=\"14:1-14:44\"><strong>\u0110i\u1ec1u ki\u1ec7n k\u00edch ho\u1ea1t (WHEN condition): <\/strong>\u0110i\u1ec1u ki\u1ec7n k\u00edch ho\u1ea1t l\u00e0 m\u1ed9t \u0111i\u1ec1u ki\u1ec7n logic t\u00f9y ch\u1ecdn x\u00e1c \u0111\u1ecbnh xem Trigger c\u00f3 n\u00ean \u0111\u01b0\u1ee3c th\u1ef1c thi hay kh\u00f4ng. \u0110i\u1ec1u ki\u1ec7n n\u00e0y \u0111\u01b0\u1ee3c vi\u1ebft b\u1eb1ng ng\u00f4n ng\u1eef SQL v\u00e0 c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng \u0111\u1ec3 ki\u1ec3m tra c\u00e1c gi\u00e1 tr\u1ecb trong b\u1ea3n ghi \u0111\u01b0\u1ee3c s\u1eeda \u0111\u1ed5i, gi\u00e1 tr\u1ecb c\u1ee7a c\u00e1c bi\u1ebfn c\u1ee5c b\u1ed9 ho\u1eb7c c\u00e1c gi\u00e1 tr\u1ecb \u0111\u01b0\u1ee3c tr\u1ea3 v\u1ec1 b\u1edfi c\u00e1c h\u00e0m.<\/p>\n<p style=\"text-align: center;\" data-sourcepos=\"14:1-14:44\"><picture><source srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2024\/07\/trigger-la-gi-5.jpg.webp 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2024\/07\/trigger-la-gi-5-300x169.jpg.webp 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2024\/07\/trigger-la-gi-5-768x432.jpg.webp 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" type=\"image\/webp\"><img decoding=\"async\" class=\"alignnone size-full wp-image-369053 webpexpress-processed\" src=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2024\/07\/trigger-la-gi-5.jpg\" alt=\"trigger-la-gi-y-cach-su-dung-trong-sql-5\" width=\"800\" height=\"450\" srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2024\/07\/trigger-la-gi-5.jpg 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2024\/07\/trigger-la-gi-5-300x169.jpg 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2024\/07\/trigger-la-gi-5-768x432.jpg 768w\" sizes=\"(max-width: 800px) 100vw, 800px\"><\/picture><\/p>\n<p data-sourcepos=\"18:1-18:40\"><strong>H\u00e0nh \u0111\u1ed9ng Trigger (BEGIN&#8230; END): <\/strong>H\u00e0nh \u0111\u1ed9ng Trigger l\u00e0 h\u00e0nh \u0111\u1ed9ng c\u1ee5 th\u1ec3 ho\u1eb7c t\u1eadp h\u1ee3p c\u00e1c h\u00e0nh \u0111\u1ed9ng m\u00e0 Trigger s\u1ebd th\u1ef1c hi\u1ec7n khi \u0111\u01b0\u1ee3c k\u00edch ho\u1ea1t. H\u00e0nh \u0111\u1ed9ng n\u00e0y c\u00f3 th\u1ec3 bao g\u1ed3m:<\/p>\n<ul data-sourcepos=\"22:1-26:0\">\n<li data-sourcepos=\"22:1-22:83\"><strong>Th\u1ef1c thi c\u00e1c truy v\u1ea5n SQL:<\/strong> C\u1eadp nh\u1eadt, x\u00f3a ho\u1eb7c ch\u00e8n d\u1eef li\u1ec7u v\u00e0o c\u00e1c b\u1ea3ng kh\u00e1c.<\/li>\n<li data-sourcepos=\"23:1-23:86\"><strong>G\u1eedi email ho\u1eb7c tin nh\u1eafn:<\/strong> Th\u00f4ng b\u00e1o cho ng\u01b0\u1eddi d\u00f9ng v\u1ec1 c\u00e1c thay \u0111\u1ed5i trong d\u1eef li\u1ec7u.<\/li>\n<li data-sourcepos=\"24:1-24:79\"><strong>Ghi nh\u1eadt k\u00fd:<\/strong> L\u01b0u l\u1ea1i l\u1ecbch s\u1eed c\u00e1c thay \u0111\u1ed5i \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n \u0111\u1ed1i v\u1edbi d\u1eef li\u1ec7u.<\/li>\n<li data-sourcepos=\"25:1-26:0\"><strong>G\u1ecdi c\u00e1c th\u1ee7 t\u1ee5c l\u01b0u tr\u1eef:<\/strong> Th\u1ef1c hi\u1ec7n c\u00e1c logic kinh doanh ph\u1ee9c t\u1ea1p h\u01a1n.<\/li>\n<\/ul>\n<h2>T\u00ecnh hu\u1ed1ng n\u00e0o c\u1ea7n d\u00f9ng Trigger trong SQL<\/h2>\n<p><span style=\"font-weight: 400;\">Nh\u1eefng t\u00ecnh hu\u1ed1ng c\u1ee5 th\u1ec3 c\u1ea7n d\u00f9ng \u0111\u1ebfn Trigger l\u00e0 g\u00ec?<\/span><\/p>\n<p><b>Ki\u1ec3m so\u00e1t t\u00ednh to\u00e0n v\u1eb9n d\u1eef li\u1ec7u: <\/b><span style=\"font-weight: 400;\">Trigger c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 th\u1ef1c thi c\u00e1c quy t\u1eafc d\u1eef li\u1ec7u, \u0111\u1ea3m b\u1ea3o r\u1eb1ng d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c th\u00eam, c\u1eadp nh\u1eadt ho\u1eb7c x\u00f3a kh\u1ecfi b\u1ea3ng lu\u00f4n h\u1ee3p l\u1ec7. Trigger c\u00f2n \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 ng\u0103n ch\u1eb7n c\u00e1c thao t\u00e1c tr\u00e1i ph\u00e9p \u0111\u1ed1i v\u1edbi d\u1eef li\u1ec7u, ch\u1eb3ng h\u1ea1n nh\u01b0 x\u00f3a b\u1ea3n ghi quan tr\u1ecdng ho\u1eb7c c\u1eadp nh\u1eadt d\u1eef li\u1ec7u sai l\u1ec7ch.<\/span><\/p>\n<p><b>Theo d\u00f5i s\u1ef1 thay \u0111\u1ed5i d\u1eef li\u1ec7u: <\/b><span style=\"font-weight: 400;\">Trigger \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 ghi l\u1ea1i l\u1ecbch s\u1eed c\u00e1c thay \u0111\u1ed5i \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n \u0111\u1ed1i v\u1edbi d\u1eef li\u1ec7u trong b\u1ea3ng. \u0110i\u1ec1u n\u00e0y c\u00f3 th\u1ec3 h\u1eefu \u00edch cho m\u1ee5c \u0111\u00edch ki\u1ec3m tra, g\u1ee1 l\u1ed7i v\u00e0 tu\u00e2n th\u1ee7.\u00a0<\/span><\/p>\n<p style=\"text-align: center;\"><picture><source srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2024\/07\/trigger-la-gi-8.jpg.webp 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2024\/07\/trigger-la-gi-8-300x169.jpg.webp 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2024\/07\/trigger-la-gi-8-768x432.jpg.webp 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" type=\"image\/webp\"><img decoding=\"async\" class=\"alignnone size-full wp-image-369056 webpexpress-processed\" src=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2024\/07\/trigger-la-gi-8.jpg\" alt=\"trigger-la-gi-y-cach-su-dung-trong-sql-8\" width=\"800\" height=\"450\" srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2024\/07\/trigger-la-gi-8.jpg 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2024\/07\/trigger-la-gi-8-300x169.jpg 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2024\/07\/trigger-la-gi-8-768x432.jpg 768w\" sizes=\"(max-width: 800px) 100vw, 800px\"><\/picture><\/p>\n<p><b>\u00c1p d\u1ee5ng logic kinh doanh ph\u1ee9c t\u1ea1p:\u00a0<\/b><\/p>\n<ul>\n<li><span style=\"font-weight: 400;\">Trigger c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 th\u1ef1c hi\u1ec7n c\u00e1c quy t\u1eafc kinh doanh ph\u1ee9c t\u1ea1p m\u00e0 kh\u00f4ng c\u1ea7n vi\u1ebft m\u00e3 th\u1ee7 c\u00f4ng trong \u1ee9ng d\u1ee5ng. V\u00ed d\u1ee5 b\u1ea1n c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng Trigger \u0111\u1ec3 t\u1ef1 \u0111\u1ed9ng t\u00ednh to\u00e1n chi\u1ebft kh\u1ea5u cho kh\u00e1ch h\u00e0ng d\u1ef1a tr\u00ean s\u1ed1 l\u01b0\u1ee3ng s\u1ea3n ph\u1ea9m h\u1ecd mua.<\/span><\/li>\n<li>Trigger c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 t\u1ef1 \u0111\u1ed9ng h\u00f3a c\u00e1c t\u00e1c v\u1ee5 th\u01b0\u1eddng xuy\u00ean \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n khi d\u1eef li\u1ec7u thay \u0111\u1ed5i. V\u00ed d\u1ee5 b\u1ea1n c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng Trigger \u0111\u1ec3 t\u1ef1 \u0111\u1ed9ng c\u1eadp nh\u1eadt b\u1ea3ng &#8220;s\u1ed1 d\u01b0 kho&#8221; sau khi c\u00f3 b\u1ea3n ghi m\u1edbi \u0111\u01b0\u1ee3c th\u00eam v\u00e0o b\u1ea3ng &#8220;\u0111\u01a1n h\u00e0ng&#8221;.<\/li>\n<\/ul>\n<p><b>\u0110\u1ed3ng b\u1ed9 h\u00f3a d\u1eef li\u1ec7u: <\/b><span style=\"font-weight: 400;\">Trigger \u0111\u01b0\u1ee3c d\u00f9ng \u0111\u1ec3 \u0111\u1ed3ng b\u1ed9 h\u00f3a cho nhi\u1ec1u b\u1ea3ng trong c\u01a1 s\u1edf d\u1eef li\u1ec7u ho\u1eb7c \u0111\u1ed3ng b\u1ed9 h\u00f3a d\u1eef li\u1ec7u trong SQL v\u1edbi c\u00e1c h\u1ec7 th\u1ed1ng kh\u00e1c (ERP ho\u1eb7c CRM). V\u00ed d\u1ee5 b\u1ea1n c\u00f3 th\u1ec3 d\u00f9ng Trigger \u0111\u1ec3 t\u1ef1 \u0111\u1ed9ng c\u1eadp nh\u1eadt b\u1ea3ng &#8220;chi ti\u1ebft \u0111\u01a1n h\u00e0ng&#8221; sau khi c\u00f3 b\u1ea3n ghi m\u1edbi \u0111\u01b0\u1ee3c th\u00eam v\u00e0o b\u1ea3ng &#8220;\u0111\u01a1n h\u00e0ng&#8221;.\u00a0<\/span><\/p>\n<h2>C\u00e1c l\u1edbp Trigger c\u01a1 b\u1ea3n c\u00f3 trong SQL Server<\/h2>\n<p data-sourcepos=\"1:1-1:47\">C\u00f3 hai lo\u1ea1i l\u1edbp Trigger ch\u00ednh trong SQL Server:<\/p>\n<p data-sourcepos=\"3:1-3:21\"><strong>AFTER Trigger: <\/strong>\u0110\u01b0\u1ee3c k\u00edch ho\u1ea1t sau khi m\u1ed9t h\u00e0nh \u0111\u1ed9ng DML (INSERT, UPDATE, DELETE) th\u00e0nh c\u00f4ng tr\u00ean b\u1ea3ng \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n. N\u00ean s\u1eed d\u1ee5ng cho c\u00e1c t\u00e1c v\u1ee5 \u0111\u01a1n gi\u1ea3n, ghi nh\u1eadt k\u00fd thay \u0111\u1ed5i d\u1eef li\u1ec7u, ho\u1eb7c th\u1ef1c hi\u1ec7n c\u00e1c ki\u1ec3m tra t\u00ednh to\u00e0n v\u1eb9n sau khi thay \u0111\u1ed5i. Gi\u1ea3 s\u1eed b\u1ea1n c\u00f3 m\u1ed9t b\u1ea3ng <em><strong>orders<\/strong> <\/em>l\u01b0u tr\u1eef th\u00f4ng tin \u0111\u01a1n h\u00e0ng. B\u1ea1n mu\u1ed1n ghi nh\u1eadt k\u00fd l\u1ecbch s\u1eed thay \u0111\u1ed5i cho m\u1ed7i \u0111\u01a1n h\u00e0ng sau khi \u0111\u01b0\u1ee3c c\u1eadp nh\u1eadt. B\u1ea1n c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng AFTER Trigger sau:<\/p>\n<blockquote>\n<p data-sourcepos=\"11:3-12:179\"><strong>CREATE<\/strong> TRIGGER log_order_changes<\/p>\n<p data-sourcepos=\"11:3-12:179\"><strong>AFTER<\/strong> UPDATE ON orders<\/p>\n<p data-sourcepos=\"11:3-12:179\"><strong>FOR EACH ROW <\/strong><\/p>\n<p data-sourcepos=\"11:3-12:179\"><strong>BEGIN <\/strong><\/p>\n<p data-sourcepos=\"11:3-12:179\"><strong>INSERT INTO<\/strong> order_history (order_id, old_status, new_status)<\/p>\n<p data-sourcepos=\"11:3-12:179\"><strong>VALUES<\/strong> (NEW.order_id, OLD.status, NEW.status);<\/p>\n<p data-sourcepos=\"11:3-12:179\"><strong>END<\/strong>;<\/p>\n<\/blockquote>\n<p style=\"text-align: center;\" data-sourcepos=\"11:3-12:179\"><picture><source srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2024\/07\/trigger-la-gi-6.jpg.webp 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2024\/07\/trigger-la-gi-6-300x169.jpg.webp 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2024\/07\/trigger-la-gi-6-768x432.jpg.webp 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" type=\"image\/webp\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-369054 webpexpress-processed\" src=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2024\/07\/trigger-la-gi-6.jpg\" alt=\"trigger-la-gi-y-cach-su-dung-trong-sql-6\" width=\"800\" height=\"450\" srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2024\/07\/trigger-la-gi-6.jpg 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2024\/07\/trigger-la-gi-6-300x169.jpg 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2024\/07\/trigger-la-gi-6-768x432.jpg 768w\" sizes=\"(max-width: 800px) 100vw, 800px\"><\/picture><\/p>\n<p data-sourcepos=\"24:1-24:26\"><strong>INSTEAD OF Trigger: <\/strong>Thay th\u1ebf ho\u00e0n to\u00e0n h\u00e0nh \u0111\u1ed9ng DML (INSERT, UPDATE, DELETE) ban \u0111\u1ea7u tr\u00ean b\u1ea3ng. N\u00ean s\u1eed d\u1ee5ng cho c\u00e1c tr\u01b0\u1eddng h\u1ee3p c\u1ea7n ki\u1ec3m so\u00e1t ho\u00e0n to\u00e0n h\u00e0nh \u0111\u1ed9ng DML, \u00e1p d\u1ee5ng logic kinh doanh ph\u1ee9c t\u1ea1p, ho\u1eb7c th\u1ef1c hi\u1ec7n c\u00e1c quy t\u1eafc d\u1eef li\u1ec7u t\u00f9y ch\u1ec9nh. Gi\u1ea3 s\u1eed b\u1ea1n c\u00f3 m\u1ed9t b\u1ea3ng <em><strong>products\u00a0<\/strong><\/em>l\u01b0u tr\u1eef th\u00f4ng tin s\u1ea3n ph\u1ea9m. B\u1ea1n mu\u1ed1n \u00e1p d\u1ee5ng quy t\u1eafc gi\u00e1 cho m\u1ed7i s\u1ea3n ph\u1ea9m khi \u0111\u01b0\u1ee3c th\u00eam v\u00e0o b\u1ea3ng. B\u1ea1n c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng INSTEAD OF Trigger sau:<\/p>\n<blockquote>\n<p data-sourcepos=\"34:3-35:178\"><strong>CREATE<\/strong> TRIGGER apply_product_pricing<\/p>\n<p data-sourcepos=\"34:3-35:178\"><strong>INSTEAD OF<\/strong> INSERT <strong>ON<\/strong> products<\/p>\n<p data-sourcepos=\"34:3-35:178\"><strong>FOR EACH ROW <\/strong><\/p>\n<p data-sourcepos=\"34:3-35:178\"><strong>BEGIN <\/strong><\/p>\n<p data-sourcepos=\"34:3-35:178\">&#8212; \u00c1p d\u1ee5ng quy t\u1eafc gi\u00e1 cho s\u1ea3n ph\u1ea9m<\/p>\n<p data-sourcepos=\"34:3-35:178\">SET NEW.price = calculate_product_price(NEW.product_type, NEW.quantity);<\/p>\n<p data-sourcepos=\"34:3-35:178\">&#8212; Th\u1ef1c hi\u1ec7n h\u00e0nh \u0111\u1ed9ng INSERT ban \u0111\u1ea7u<\/p>\n<p data-sourcepos=\"34:3-35:178\"><strong>INSERT INTO<\/strong> products (product_id, product_type, quantity, price)<\/p>\n<p data-sourcepos=\"34:3-35:178\"><strong>VALUES<\/strong> (NEW.product_id, NEW.product_type, NEW.quantity, NEW.price);<\/p>\n<p data-sourcepos=\"34:3-35:178\"><strong>END<\/strong>;<\/p>\n<\/blockquote>\n<h2>\u01afu v\u00e0 nh\u01b0\u1ee3c \u0111i\u1ec3m c\u1ee7a Trigger l\u00e0 g\u00ec?<\/h2>\n<p><span style=\"font-weight: 400;\">Vi\u1ec7c c\u00e2n nh\u1eafc k\u1ef9 l\u01b0\u1ee1ng m\u1ee5c \u0111\u00edch s\u1eed d\u1ee5ng, thi\u1ebft k\u1ebf Trigger hi\u1ec7u qu\u1ea3 v\u00e0 t\u1ed1i \u01b0u h\u00f3a hi\u1ec7u su\u1ea5t s\u1ebd gi\u00fap b\u1ea1n khai th\u00e1c t\u1ed1i \u0111a l\u1ee3i \u00edch c\u1ee7a Trigger v\u00e0 n\u00e2ng cao hi\u1ec7u qu\u1ea3 ho\u1ea1t \u0111\u1ed9ng c\u1ee7a c\u01a1 s\u1edf d\u1eef li\u1ec7u.<\/span><\/p>\n<p><b>\u01afu \u0111i\u1ec3m:<\/b><\/p>\n<ul>\n<li style=\"font-weight: 400;\"><b>T\u1ef1 \u0111\u1ed9ng h\u00f3a t\u00e1c v\u1ee5:<\/b><span style=\"font-weight: 400;\"> Trigger gi\u00fap t\u1ef1 \u0111\u1ed9ng h\u00f3a c\u00e1c t\u00e1c v\u1ee5 th\u01b0\u1eddng xuy\u00ean \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n khi d\u1eef li\u1ec7u thay \u0111\u1ed5i, ti\u1ebft ki\u1ec7m th\u1eddi gian v\u00e0 c\u00f4ng s\u1ee9c cho ng\u01b0\u1eddi d\u00f9ng.<\/span><\/li>\n<li style=\"font-weight: 400;\"><b>C\u1ea3i thi\u1ec7n t\u00ednh to\u00e0n v\u1eb9n d\u1eef li\u1ec7u:<\/b><span style=\"font-weight: 400;\"> Trigger c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 th\u1ef1c thi c\u00e1c quy t\u1eafc d\u1eef li\u1ec7u, \u0111\u1ea3m b\u1ea3o r\u1eb1ng d\u1eef li\u1ec7u trong c\u01a1 s\u1edf d\u1eef li\u1ec7u lu\u00f4n h\u1ee3p l\u1ec7 v\u00e0 ch\u00ednh x\u00e1c.<\/span><\/li>\n<li style=\"font-weight: 400;\"><b>T\u0103ng c\u01b0\u1eddng b\u1ea3o m\u1eadt:<\/b><span style=\"font-weight: 400;\"> Trigger c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 ki\u1ec3m so\u00e1t quy\u1ec1n truy c\u1eadp d\u1eef li\u1ec7u v\u00e0 ng\u0103n ch\u1eb7n c\u00e1c thao t\u00e1c tr\u00e1i ph\u00e9p.<\/span><\/li>\n<li style=\"font-weight: 400;\"><b>D\u1ec5 d\u00e0ng tri\u1ec3n khai v\u00e0 s\u1eed d\u1ee5ng:<\/b><span style=\"font-weight: 400;\"> Trigger \u0111\u01b0\u1ee3c vi\u1ebft b\u1eb1ng ng\u00f4n ng\u1eef SQL quen thu\u1ed9c, d\u1ec5 d\u00e0ng tri\u1ec3n khai v\u00e0 s\u1eed d\u1ee5ng cho ng\u01b0\u1eddi d\u00f9ng c\u00f3 ki\u1ebfn th\u1ee9c SQL c\u01a1 b\u1ea3n.<\/span><\/li>\n<\/ul>\n<p style=\"text-align: center;\"><picture><source srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2024\/07\/trigger-la-gi-4.jpg.webp 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2024\/07\/trigger-la-gi-4-300x169.jpg.webp 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2024\/07\/trigger-la-gi-4-768x432.jpg.webp 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" type=\"image\/webp\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-369052 webpexpress-processed\" src=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2024\/07\/trigger-la-gi-4.jpg\" alt=\"trigger-la-gi-y-cach-su-dung-trong-sql-4\" width=\"800\" height=\"450\" srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2024\/07\/trigger-la-gi-4.jpg 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2024\/07\/trigger-la-gi-4-300x169.jpg 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2024\/07\/trigger-la-gi-4-768x432.jpg 768w\" sizes=\"(max-width: 800px) 100vw, 800px\"><\/picture><\/p>\n<p><b>Nh\u01b0\u1ee3c \u0111i\u1ec3m:<\/b><\/p>\n<ul>\n<li style=\"font-weight: 400;\"><b>\u1ea2nh h\u01b0\u1edfng \u0111\u1ebfn hi\u1ec7u su\u1ea5t:<\/b><span style=\"font-weight: 400;\"> Trigger c\u00f3 th\u1ec3 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn hi\u1ec7u su\u1ea5t truy v\u1ea5n n\u1ebfu kh\u00f4ng \u0111\u01b0\u1ee3c t\u1ed1i \u01b0u h\u00f3a c\u1ea9n th\u1eadn, \u0111\u1eb7c bi\u1ec7t l\u00e0 v\u1edbi c\u00e1c Trigger ph\u1ee9c t\u1ea1p ho\u1eb7c \u0111\u01b0\u1ee3c k\u00edch ho\u1ea1t th\u01b0\u1eddng xuy\u00ean.<\/span><\/li>\n<li style=\"font-weight: 400;\"><b>Kh\u00f3 g\u1ee1 l\u1ed7i:<\/b><span style=\"font-weight: 400;\"> Vi\u1ec7c g\u1ee1 l\u1ed7i Trigger c\u00f3 th\u1ec3 kh\u00f3 kh\u0103n h\u01a1n so v\u1edbi g\u1ee1 l\u1ed7i truy v\u1ea5n SQL th\u00f4ng th\u01b0\u1eddng, do c\u1ea7n x\u00e1c \u0111\u1ecbnh nguy\u00ean nh\u00e2n l\u1ed7i t\u1eeb c\u1ea3 m\u00e3 Trigger v\u00e0 m\u00e3 truy v\u1ea5n.<\/span><\/li>\n<li style=\"font-weight: 400;\"><b>Nguy c\u01a1 ti\u1ec1m \u1ea9n v\u1ec1 b\u1ea3o m\u1eadt:<\/b><span style=\"font-weight: 400;\"> Trigger c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng cho m\u1ee5c \u0111\u00edch \u0111\u1ed9c h\u1ea1i n\u1ebfu kh\u00f4ng \u0111\u01b0\u1ee3c ki\u1ec3m so\u00e1t ch\u1eb7t ch\u1ebd, t\u1ea1o ra l\u1ed7 h\u1ed5ng b\u1ea3o m\u1eadt cho c\u01a1 s\u1edf d\u1eef li\u1ec7u.<\/span><\/li>\n<\/ul>\n<h2>Gi\u1ea3i th\u00edch c\u00fa ph\u00e1p chung c\u1ee7a Trigger<\/h2>\n<p data-sourcepos=\"3:1-3:174\">C\u00fa ph\u00e1p chung c\u1ee7a Trigger trong SQL c\u00f3 th\u1ec3 thay \u0111\u1ed5i m\u1ed9t ch\u00fat t\u00f9y theo phi\u00ean b\u1ea3n SQL Server c\u1ee5 th\u1ec3 m\u00e0 b\u1ea1n \u0111ang s\u1eed d\u1ee5ng. Tuy nhi\u00ean, th\u00e0nh ph\u1ea7n c\u01a1 b\u1ea3n v\u1eabn \u0111\u01b0\u1ee3c gi\u1eef nguy\u00ean. V\u1eady c\u1ea5u tr\u00fac c\u01a1 b\u1ea3n c\u1ee7a Trigger l\u00e0 g\u00ec?<\/p>\n<div class=\"code-block ng-tns-c2679006685-174 ng-trigger ng-trigger-codeBlockRevealAnimation\">\n<blockquote>\n<div><strong>CREATE<\/strong> TRIGGER trigger_name<\/div>\n<div>{BEFORE | AFTER | INSTEAD OF}<\/div>\n<div>{INSERT | UPDATE | DELETE | DDL}<\/div>\n<div><strong>ON<\/strong> table_name<\/div>\n<div><strong>FOR EACH ROW <\/strong><\/div>\n<div>[WHEN condition]<\/div>\n<div><strong>BEGIN <\/strong><\/div>\n<div>trigger_body<\/div>\n<div><strong>END<\/strong>;<\/div>\n<\/blockquote>\n<div class=\"code-block-internal-container ng-tns-c2679006685-174\">\n<div class=\"animated-opacity ng-tns-c2679006685-174\" style=\"text-align: center;\">\n<pre class=\"ng-tns-c2679006685-174\"><picture><source srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2024\/07\/trigger-la-gi-10.jpg.webp 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2024\/07\/trigger-la-gi-10-300x169.jpg.webp 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2024\/07\/trigger-la-gi-10-768x432.jpg.webp 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" type=\"image\/webp\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-369058 webpexpress-processed\" src=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2024\/07\/trigger-la-gi-10.jpg\" alt=\"trigger-la-gi-y-cach-su-dung-trong-sql-10\" width=\"800\" height=\"450\" srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2024\/07\/trigger-la-gi-10.jpg 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2024\/07\/trigger-la-gi-10-300x169.jpg 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2024\/07\/trigger-la-gi-10-768x432.jpg 768w\" sizes=\"(max-width: 800px) 100vw, 800px\"><\/picture><\/pre>\n<\/div>\n<\/div>\n<\/div>\n<p data-sourcepos=\"17:1-17:38\">Gi\u1ea3i th\u00edch c\u00e1c ph\u1ea7n trong c\u00fa ph\u00e1p:<\/p>\n<ul data-sourcepos=\"19:1-19:48\">\n<li data-sourcepos=\"19:1-19:48\"><strong>CREATE TRIGGER:<\/strong> Kh\u00f3a t\u1eeb \u0111\u1ec3 t\u1ea1o m\u1ed9t Trigger m\u1edbi.<\/li>\n<li data-sourcepos=\"20:1-20:94\"><strong>trigger_name:<\/strong> T\u00ean c\u1ee7a Trigger. N\u00ean \u0111\u1eb7t t\u00ean m\u00f4 t\u1ea3 ch\u1ee9c n\u0103ng c\u1ee7a Trigger m\u1ed9t c\u00e1ch r\u00f5 r\u00e0ng.<\/li>\n<li data-sourcepos=\"21:1-23:97\"><strong>{BEFORE | AFTER | INSTEAD OF}:<\/strong> X\u00e1c \u0111\u1ecbnh th\u1eddi \u0111i\u1ec3m k\u00edch ho\u1ea1t Trigger.<\/li>\n<li data-sourcepos=\"24:1-28:144\"><strong>{INSERT | UPDATE | DELETE | DDL}:<\/strong> X\u00e1c \u0111\u1ecbnh s\u1ef1 ki\u1ec7n k\u00edch ho\u1ea1t Trigger.<\/li>\n<li data-sourcepos=\"29:1-29:59\"><strong>ON table_name:<\/strong> X\u00e1c \u0111\u1ecbnh b\u1ea3ng m\u00e0 Trigger \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng.<\/li>\n<li data-sourcepos=\"30:1-30:100\"><strong>FOR EACH ROW:<\/strong> Ch\u1ec9 \u0111\u1ecbnh r\u1eb1ng Trigger s\u1ebd \u0111\u01b0\u1ee3c th\u1ef1c thi cho m\u1ed7i b\u1ea3n ghi \u0111\u01b0\u1ee3c thay \u0111\u1ed5i trong b\u1ea3ng.<\/li>\n<li data-sourcepos=\"31:1-31:100\"><strong>[WHEN condition]:<\/strong> (T\u00f9y ch\u1ecdn) \u0110i\u1ec1u ki\u1ec7n \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh xem Trigger c\u00f3 n\u00ean \u0111\u01b0\u1ee3c th\u1ef1c thi hay kh\u00f4ng.<\/li>\n<li data-sourcepos=\"32:1-32:12\"><strong>BEGIN:<\/strong> Kh\u1edfi \u0111\u1ea7u kh\u1ed1i m\u00e3 c\u1ee7a Trigger.<\/li>\n<li data-sourcepos=\"33:1-33:90\"><strong>trigger_body:<\/strong> Kh\u1ed1i m\u00e3 ch\u1ee9a c\u00e1c h\u00e0nh \u0111\u1ed9ng m\u00e0 Trigger s\u1ebd th\u1ef1c hi\u1ec7n khi \u0111\u01b0\u1ee3c k\u00edch ho\u1ea1t.<\/li>\n<li data-sourcepos=\"34:1-35:0\"><strong>END:<\/strong> K\u1ebft th\u00fac kh\u1ed1i m\u00e3 c\u1ee7a Trigger.<\/li>\n<\/ul>\n<p data-sourcepos=\"52:1-52:10\">L\u01b0u \u00fd, n\u00ean s\u1eed d\u1ee5ng c\u00e1c b\u00ecnh lu\u1eadn \u0111\u1ec3 gi\u1ea3i th\u00edch r\u00f5 r\u00e0ng m\u1ee5c \u0111\u00edch s\u1eed d\u1ee5ng c\u1ee7a Trigger v\u00e0 c\u00e1c h\u00e0nh \u0111\u1ed9ng \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n trong kh\u1ed1i m\u00e3. C\u1ea7n th\u1eed nghi\u1ec7m Trigger c\u1ea9n th\u1eadn tr\u01b0\u1edbc khi tri\u1ec3n khai trong m\u00f4i tr\u01b0\u1eddng th\u1ef1c. B\u00ean c\u1ea1nh \u0111\u00f3 n\u00ean theo d\u00f5i hi\u1ec7u su\u1ea5t c\u1ee7a Trigger v\u00e0 t\u1ed1i \u01b0u h\u00f3a n\u1ebfu c\u1ea7n thi\u1ebft \u0111\u1ec3 tr\u00e1nh \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn hi\u1ec7u su\u1ea5t truy v\u1ea5n.<\/p>\n<h2>C\u00e1ch \u1ee9ng d\u1ee5ng Trigger chu\u1ea9n x\u00e1c trong SQL Server<\/h2>\n<p data-sourcepos=\"3:1-3:93\">\u0110\u1ec3 s\u1eed d\u1ee5ng Trigger trong SQL Server m\u1ed9t c\u00e1ch chu\u1ea9n x\u00e1c v\u00e0 hi\u1ec7u qu\u1ea3, b\u1ea1n c\u1ea7n l\u01b0u \u00fd m\u1ed9t s\u1ed1 \u0111i\u1ec3m sau:<\/p>\n<p data-sourcepos=\"5:1-5:44\"><strong>X\u00e1c \u0111\u1ecbnh r\u00f5 m\u1ee5c \u0111\u00edch s\u1eed d\u1ee5ng Trigger: <\/strong>X\u00e1c \u0111\u1ecbnh r\u00f5 r\u00e0ng v\u1ea5n \u0111\u1ec1 c\u1ea7n gi\u1ea3i quy\u1ebft ho\u1eb7c t\u00e1c v\u1ee5 c\u1ea7n t\u1ef1 \u0111\u1ed9ng h\u00f3a b\u1eb1ng Trigger. Ph\u00e2n t\u00edch c\u00e1c y\u00eau c\u1ea7u c\u1ee5 th\u1ec3 v\u1ec1 th\u1eddi \u0111i\u1ec3m k\u00edch ho\u1ea1t, s\u1ef1 ki\u1ec7n k\u00edch ho\u1ea1t, b\u1ea3ng \u00e1p d\u1ee5ng v\u00e0 h\u00e0nh \u0111\u1ed9ng c\u1ea7n th\u1ef1c hi\u1ec7n.<\/p>\n<p data-sourcepos=\"10:1-10:37\"><strong>L\u1ef1a ch\u1ecdn lo\u1ea1i Trigger ph\u00f9 h\u1ee3p: <\/strong>Nh\u01b0 \u0111\u00e3 t\u00ecm hi\u1ec3u trong n\u1ed9i dung c\u00e1c l\u1edbp Trigger l\u00e0 g\u00ec, b\u1ea1n c\u00f3 th\u1ec3 ch\u1ecdn\u00a0AFTER Trigger \u0111\u1ec3 s\u1eed d\u1ee5ng cho c\u00e1c t\u00e1c v\u1ee5 sau khi d\u1eef li\u1ec7u \u0111\u00e3 \u0111\u01b0\u1ee3c thay \u0111\u1ed5i ho\u1eb7c\u00a0INSTEAD OF Trigger cho c\u00e1c tr\u01b0\u1eddng h\u1ee3p c\u1ea7n ki\u1ec3m so\u00e1t ho\u00e0n to\u00e0n h\u00e0nh \u0111\u1ed9ng DML.<\/p>\n<p style=\"text-align: center;\" data-sourcepos=\"10:1-10:37\"><picture><source srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2024\/07\/trigger-la-gi-7.jpg.webp 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2024\/07\/trigger-la-gi-7-300x169.jpg.webp 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/webp-express\/webp-images\/uploads\/2024\/07\/trigger-la-gi-7-768x432.jpg.webp 768w\" sizes=\"(max-width: 800px) 100vw, 800px\" type=\"image\/webp\"><img loading=\"lazy\" decoding=\"async\" class=\"alignnone size-full wp-image-369055 webpexpress-processed\" src=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2024\/07\/trigger-la-gi-7.jpg\" alt=\"trigger-la-gi-y-cach-su-dung-trong-sql-7\" width=\"800\" height=\"450\" srcset=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2024\/07\/trigger-la-gi-7.jpg 800w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2024\/07\/trigger-la-gi-7-300x169.jpg 300w, https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2024\/07\/trigger-la-gi-7-768x432.jpg 768w\" sizes=\"(max-width: 800px) 100vw, 800px\"><\/picture><\/p>\n<p data-sourcepos=\"15:1-15:38\"><strong>Vi\u1ebft c\u00fa ph\u00e1p Trigger ch\u00ednh x\u00e1c:<\/strong><\/p>\n<ul data-sourcepos=\"17:1-17:38\">\n<li data-sourcepos=\"17:1-17:38\">S\u1eed d\u1ee5ng c\u00fa ph\u00e1p SQL Server chu\u1ea9n x\u00e1c cho lo\u1ea1i Trigger \u0111\u00e3 ch\u1ecdn.<\/li>\n<li data-sourcepos=\"18:1-18:174\">X\u00e1c \u0111\u1ecbnh r\u00f5 r\u00e0ng c\u00e1c th\u00e0nh ph\u1ea7n trong c\u00fa ph\u00e1p, bao g\u1ed3m t\u00ean Trigger, th\u1eddi \u0111i\u1ec3m k\u00edch ho\u1ea1t, s\u1ef1 ki\u1ec7n k\u00edch ho\u1ea1t, b\u1ea3ng \u00e1p d\u1ee5ng, \u0111i\u1ec1u ki\u1ec7n k\u00edch ho\u1ea1t (t\u00f9y ch\u1ecdn) v\u00e0 kh\u1ed1i m\u00e3 Trigger.<\/li>\n<li data-sourcepos=\"19:1-20:0\">S\u1eed d\u1ee5ng c\u00e1c b\u00ecnh lu\u1eadn \u0111\u1ec3 gi\u1ea3i th\u00edch r\u00f5 r\u00e0ng m\u1ee5c \u0111\u00edch s\u1eed d\u1ee5ng c\u1ee7a Trigger v\u00e0 c\u00e1c h\u00e0nh \u0111\u1ed9ng \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n trong kh\u1ed1i m\u00e3.<\/li>\n<\/ul>\n<p data-sourcepos=\"21:1-21:38\"><strong>Ki\u1ec3m tra v\u00e0 t\u1ed1i \u01b0u h\u00f3a Trigger:<\/strong><\/p>\n<ul data-sourcepos=\"23:1-26:0\">\n<li data-sourcepos=\"23:1-23:92\">Ki\u1ec3m tra k\u1ef9 l\u01b0\u1ee1ng c\u00fa ph\u00e1p v\u00e0 logic c\u1ee7a Trigger tr\u01b0\u1edbc khi tri\u1ec3n khai trong m\u00f4i tr\u01b0\u1eddng th\u1ef1c.<\/li>\n<li data-sourcepos=\"24:1-24:104\">S\u1eed d\u1ee5ng c\u00e1c c\u00f4ng c\u1ee5 ph\u00e2n t\u00edch hi\u1ec7u su\u1ea5t \u0111\u1ec3 theo d\u00f5i hi\u1ec7u su\u1ea5t c\u1ee7a Trigger v\u00e0 t\u1ed1i \u01b0u h\u00f3a n\u1ebfu c\u1ea7n thi\u1ebft.<\/li>\n<li data-sourcepos=\"25:1-26:0\">Tr\u00e1nh s\u1eed d\u1ee5ng Trigger qu\u00e1 m\u1ee9c c\u00f3 th\u1ec3 l\u00e0m ph\u1ee9c t\u1ea1p m\u00e3 SQL v\u00e0 \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn hi\u1ec7u su\u1ea5t truy v\u1ea5n.<\/li>\n<\/ul>\n<h2>L\u1eddi k\u1ebft<\/h2>\n<p>Vi\u1ec7c \u1ee9ng d\u1ee5ng Trigger c\u00f3 th\u1ec3 gi\u00fap b\u1ea1n qu\u1ea3n l\u00fd, t\u1ed1i \u01b0u h\u00f3a hi\u1ec7u su\u1ea5t c\u01a1 s\u1edf d\u1eef li\u1ec7u trong SQL v\u00e0 \u0111\u1ea1t \u0111\u01b0\u1ee3c m\u1ee5c ti\u00eau kinh doanh m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3. Hy v\u1ecdng b\u00e0i vi\u1ebft kh\u00e1m ph\u00e1 Trigger l\u00e0 g\u00ec m\u00e0 <a href=\"https:\/\/hoanghamobile.com\/\">Ho\u00e0ng H\u00e0 Mobile<\/a> mang \u0111\u1ebfn ng\u00e0y h\u00f4m nay \u0111\u00e3 gi\u00fap b\u1ea1n c\u00f3 th\u00eam ki\u1ebfn th\u1ee9c \u0111\u1ec3 bi\u1ebfn n\u00f3 th\u00e0nh tr\u1ee3 th\u1ee7 \u0111\u1eafc l\u1ef1c cho c\u00f4ng vi\u1ec7c qu\u1ea3n tr\u1ecb d\u1eef li\u1ec7u c\u1ee7a b\u1ea1n!<\/p>\n<p>XEM TH\u00caM:<\/p>\n<ul>\n<li><strong><a href=\"https:\/\/hoanghamobile.com\/tin-tuc\/tester-la-gi\/\">Tester l\u00e0 g\u00ec? K\u1ef9 n\u0103ng c\u1ea7n thi\u1ebft \u0111\u1ec3 tr\u1edf th\u00e0nh m\u1ed9t Tester<\/a><\/strong><\/li>\n<li><strong><a href=\"https:\/\/hoanghamobile.com\/tin-tuc\/cloze-test-la-gi\/\">Cloze Test l\u00e0 g\u00ec? T\u1ed5ng h\u1ee3p ki\u1ebfn th\u1ee9c v\u00e0 b\u00ed quy\u1ebft l\u00e0m b\u00e0i<\/a><\/strong><\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>B\u1ea1n c\u00f3 t\u1eebng nghe ai \u0111\u00f3 n\u00f3i &#8220;t\u00f4i b\u1ecb trigger&#8221; tr\u00ean m\u1ea1ng x\u00e3 h\u1ed9i, hay \u0111\u1ecdc t\u00e0i li\u1ec7u k\u1ef9 thu\u1eadt nh\u1eafc \u0111\u1ebfn &#8220;SQL trigger&#8221;? &#8220;Trigger&#8221; l\u00e0 m\u1ed9t t\u1eeb ti\u1ebfng Anh \u0111a ngh\u0129a, xu\u1ea5t hi\u1ec7n trong nhi\u1ec1u b\u1ed1i c\u1ea3nh t\u1eeb t\u00e2m l\u00fd h\u1ecdc, \u0111\u1eddi s\u1ed1ng h\u00e0ng ng\u00e0y \u0111\u1ebfn l\u1eadp tr\u00ecnh c\u01a1 s\u1edf d\u1eef li\u1ec7u. Vi\u1ec7c hi\u1ec3u [&hellip;]<\/p>\n","protected":false},"author":75,"featured_media":369057,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[3910,30453],"tags":[],"class_list":["post-368051","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-kham-pha","category-kien-thuc"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v24.2 (Yoast SEO v24.2) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Trigger l\u00e0 g\u00ec? T\u1eeb t\u00e2m l\u00fd h\u1ecdc, m\u1ea1ng x\u00e3 h\u1ed9i \u0111\u1ebfn Trigger trong SQL<\/title>\n<meta name=\"description\" content=\"Trigger l\u00e0 g\u00ec? C\u00f9ng t\u00ecm hi\u1ec3u \u00fd ngh\u0129a c\u1ee7a Trigger trong t\u00e2m l\u00fd h\u1ecdc (sang ch\u1ea5n), tr\u00ean m\u1ea1ng x\u00e3 h\u1ed9i v\u00e0 c\u00e1ch s\u1eed d\u1ee5ng Trigger trong SQL \u0111\u1ec3 t\u1ef1 \u0111\u1ed9ng h\u00f3a c\u01a1 s\u1edf d\u1eef li\u1ec7u.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/hoanghamobile.com\/tin-tuc\/trigger-la-gi\/\" \/>\n<meta property=\"og:locale\" content=\"vi_VN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Trigger l\u00e0 g\u00ec? Gi\u1ea3i m\u00e3 \u00fd ngh\u0129a trong m\u1ecdi l\u0129nh v\u1ef1c\" \/>\n<meta property=\"og:description\" content=\"Trigger l\u00e0 g\u00ec? C\u00f9ng t\u00ecm hi\u1ec3u \u00fd ngh\u0129a c\u1ee7a Trigger trong t\u00e2m l\u00fd h\u1ecdc (sang ch\u1ea5n), tr\u00ean m\u1ea1ng x\u00e3 h\u1ed9i v\u00e0 c\u00e1ch s\u1eed d\u1ee5ng Trigger trong SQL \u0111\u1ec3 t\u1ef1 \u0111\u1ed9ng h\u00f3a c\u01a1 s\u1edf d\u1eef li\u1ec7u.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/hoanghamobile.com\/tin-tuc\/trigger-la-gi\/\" \/>\n<meta property=\"og:site_name\" content=\"Tin t\u1ee9c c\u00f4ng ngh\u1ec7 - HoangHaMobile\" \/>\n<meta property=\"article:publisher\" content=\"https:\/\/www.facebook.com\/hoanghamobilecom\" \/>\n<meta property=\"article:published_time\" content=\"2024-07-21T05:48:49+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-10-18T12:27:53+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2024\/07\/trigger-la-gi-9.jpg\" \/>\n\t<meta property=\"og:image:width\" content=\"1200\" \/>\n\t<meta property=\"og:image:height\" content=\"628\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/jpeg\" \/>\n<meta name=\"author\" content=\"Vo Lan\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u0110\u01b0\u1ee3c vi\u1ebft b\u1edfi\" \/>\n\t<meta name=\"twitter:data1\" content=\"Vo Lan\" \/>\n\t<meta name=\"twitter:label2\" content=\"\u01af\u1edbc t\u00ednh th\u1eddi gian \u0111\u1ecdc\" \/>\n\t<meta name=\"twitter:data2\" content=\"15 ph\u00fat\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"Article\",\"@id\":\"https:\/\/hoanghamobile.com\/tin-tuc\/trigger-la-gi\/#article\",\"isPartOf\":{\"@id\":\"https:\/\/hoanghamobile.com\/tin-tuc\/trigger-la-gi\/\"},\"author\":{\"name\":\"Vo Lan\",\"@id\":\"https:\/\/hoanghamobile.com\/tin-tuc\/#\/schema\/person\/0a812d5b8175a4091883285291c094d0\"},\"headline\":\"Trigger l\u00e0 g\u00ec? Gi\u1ea3i m\u00e3 \u00fd ngh\u0129a trong m\u1ecdi l\u0129nh v\u1ef1c\",\"datePublished\":\"2024-07-21T05:48:49+00:00\",\"dateModified\":\"2025-10-18T12:27:53+00:00\",\"mainEntityOfPage\":{\"@id\":\"https:\/\/hoanghamobile.com\/tin-tuc\/trigger-la-gi\/\"},\"wordCount\":3789,\"commentCount\":0,\"publisher\":{\"@id\":\"https:\/\/hoanghamobile.com\/tin-tuc\/#organization\"},\"image\":{\"@id\":\"https:\/\/hoanghamobile.com\/tin-tuc\/trigger-la-gi\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2024\/07\/trigger-la-gi-9.jpg\",\"articleSection\":[\"Kh\u00e1m Ph\u00e1\",\"Ki\u1ebfn Th\u1ee9c\"],\"inLanguage\":\"vi\",\"potentialAction\":[{\"@type\":\"CommentAction\",\"name\":\"Comment\",\"target\":[\"https:\/\/hoanghamobile.com\/tin-tuc\/trigger-la-gi\/#respond\"]}],\"copyrightYear\":\"2024\",\"copyrightHolder\":{\"@id\":\"https:\/\/hoanghamobile.com\/tin-tuc\/#organization\"}},{\"@type\":\"WebPage\",\"@id\":\"https:\/\/hoanghamobile.com\/tin-tuc\/trigger-la-gi\/\",\"url\":\"https:\/\/hoanghamobile.com\/tin-tuc\/trigger-la-gi\/\",\"name\":\"Trigger l\u00e0 g\u00ec? T\u1eeb t\u00e2m l\u00fd h\u1ecdc, m\u1ea1ng x\u00e3 h\u1ed9i \u0111\u1ebfn Trigger trong SQL\",\"isPartOf\":{\"@id\":\"https:\/\/hoanghamobile.com\/tin-tuc\/#website\"},\"primaryImageOfPage\":{\"@id\":\"https:\/\/hoanghamobile.com\/tin-tuc\/trigger-la-gi\/#primaryimage\"},\"image\":{\"@id\":\"https:\/\/hoanghamobile.com\/tin-tuc\/trigger-la-gi\/#primaryimage\"},\"thumbnailUrl\":\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2024\/07\/trigger-la-gi-9.jpg\",\"datePublished\":\"2024-07-21T05:48:49+00:00\",\"dateModified\":\"2025-10-18T12:27:53+00:00\",\"description\":\"Trigger l\u00e0 g\u00ec? C\u00f9ng t\u00ecm hi\u1ec3u \u00fd ngh\u0129a c\u1ee7a Trigger trong t\u00e2m l\u00fd h\u1ecdc (sang ch\u1ea5n), tr\u00ean m\u1ea1ng x\u00e3 h\u1ed9i v\u00e0 c\u00e1ch s\u1eed d\u1ee5ng Trigger trong SQL \u0111\u1ec3 t\u1ef1 \u0111\u1ed9ng h\u00f3a c\u01a1 s\u1edf d\u1eef li\u1ec7u.\",\"breadcrumb\":{\"@id\":\"https:\/\/hoanghamobile.com\/tin-tuc\/trigger-la-gi\/#breadcrumb\"},\"inLanguage\":\"vi\",\"potentialAction\":[{\"@type\":\"ReadAction\",\"target\":[\"https:\/\/hoanghamobile.com\/tin-tuc\/trigger-la-gi\/\"]}]},{\"@type\":\"ImageObject\",\"inLanguage\":\"vi\",\"@id\":\"https:\/\/hoanghamobile.com\/tin-tuc\/trigger-la-gi\/#primaryimage\",\"url\":\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2024\/07\/trigger-la-gi-9.jpg\",\"contentUrl\":\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2024\/07\/trigger-la-gi-9.jpg\",\"width\":1200,\"height\":628,\"caption\":\"trigger-la-gi-y-cach-su-dung-trong-sql-9\"},{\"@type\":\"BreadcrumbList\",\"@id\":\"https:\/\/hoanghamobile.com\/tin-tuc\/trigger-la-gi\/#breadcrumb\",\"itemListElement\":[{\"@type\":\"ListItem\",\"position\":1,\"name\":\"Trang ch\u1ee7\",\"item\":\"https:\/\/hoanghamobile.com\/tin-tuc\/\"},{\"@type\":\"ListItem\",\"position\":2,\"name\":\"Trigger l\u00e0 g\u00ec? Gi\u1ea3i m\u00e3 \u00fd ngh\u0129a trong m\u1ecdi l\u0129nh v\u1ef1c\"}]},{\"@type\":\"WebSite\",\"@id\":\"https:\/\/hoanghamobile.com\/tin-tuc\/#website\",\"url\":\"https:\/\/hoanghamobile.com\/tin-tuc\/\",\"name\":\"Tin t\u1ee9c c\u00f4ng ngh\u1ec7 - HoangHaMobile\",\"description\":\"\",\"publisher\":{\"@id\":\"https:\/\/hoanghamobile.com\/tin-tuc\/#organization\"},\"potentialAction\":[{\"@type\":\"SearchAction\",\"target\":{\"@type\":\"EntryPoint\",\"urlTemplate\":\"https:\/\/hoanghamobile.com\/tin-tuc\/?s={search_term_string}\"},\"query-input\":{\"@type\":\"PropertyValueSpecification\",\"valueRequired\":true,\"valueName\":\"search_term_string\"}}],\"inLanguage\":\"vi\"},{\"@type\":\"Organization\",\"@id\":\"https:\/\/hoanghamobile.com\/tin-tuc\/#organization\",\"name\":\"Tin t\u1ee9c c\u00f4ng ngh\u1ec7 - HoangHaMobile\",\"url\":\"https:\/\/hoanghamobile.com\/tin-tuc\/\",\"logo\":{\"@type\":\"ImageObject\",\"inLanguage\":\"vi\",\"@id\":\"https:\/\/hoanghamobile.com\/tin-tuc\/#\/schema\/logo\/image\/\",\"url\":\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2021\/12\/logo-text.png\",\"contentUrl\":\"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2021\/12\/logo-text.png\",\"width\":256,\"height\":37,\"caption\":\"Tin t\u1ee9c c\u00f4ng ngh\u1ec7 - HoangHaMobile\"},\"image\":{\"@id\":\"https:\/\/hoanghamobile.com\/tin-tuc\/#\/schema\/logo\/image\/\"},\"sameAs\":[\"https:\/\/www.facebook.com\/hoanghamobilecom\"]},{\"@type\":\"Person\",\"@id\":\"https:\/\/hoanghamobile.com\/tin-tuc\/#\/schema\/person\/0a812d5b8175a4091883285291c094d0\",\"name\":\"Vo Lan\",\"image\":{\"@type\":\"ImageObject\",\"inLanguage\":\"vi\",\"@id\":\"https:\/\/hoanghamobile.com\/tin-tuc\/#\/schema\/person\/image\/\",\"url\":\"https:\/\/secure.gravatar.com\/avatar\/fd70d1838a6fc3aa34a3a78f6253c3d4?s=96&d=mm&r=g\",\"contentUrl\":\"https:\/\/secure.gravatar.com\/avatar\/fd70d1838a6fc3aa34a3a78f6253c3d4?s=96&d=mm&r=g\",\"caption\":\"Vo Lan\"},\"url\":\"https:\/\/hoanghamobile.com\/tin-tuc\/author\/vo-lan\/\"}]}<\/script>\n<!-- \/ Yoast SEO Premium plugin. -->","yoast_head_json":{"title":"Trigger l\u00e0 g\u00ec? T\u1eeb t\u00e2m l\u00fd h\u1ecdc, m\u1ea1ng x\u00e3 h\u1ed9i \u0111\u1ebfn Trigger trong SQL","description":"Trigger l\u00e0 g\u00ec? C\u00f9ng t\u00ecm hi\u1ec3u \u00fd ngh\u0129a c\u1ee7a Trigger trong t\u00e2m l\u00fd h\u1ecdc (sang ch\u1ea5n), tr\u00ean m\u1ea1ng x\u00e3 h\u1ed9i v\u00e0 c\u00e1ch s\u1eed d\u1ee5ng Trigger trong SQL \u0111\u1ec3 t\u1ef1 \u0111\u1ed9ng h\u00f3a c\u01a1 s\u1edf d\u1eef li\u1ec7u.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/hoanghamobile.com\/tin-tuc\/trigger-la-gi\/","og_locale":"vi_VN","og_type":"article","og_title":"Trigger l\u00e0 g\u00ec? Gi\u1ea3i m\u00e3 \u00fd ngh\u0129a trong m\u1ecdi l\u0129nh v\u1ef1c","og_description":"Trigger l\u00e0 g\u00ec? C\u00f9ng t\u00ecm hi\u1ec3u \u00fd ngh\u0129a c\u1ee7a Trigger trong t\u00e2m l\u00fd h\u1ecdc (sang ch\u1ea5n), tr\u00ean m\u1ea1ng x\u00e3 h\u1ed9i v\u00e0 c\u00e1ch s\u1eed d\u1ee5ng Trigger trong SQL \u0111\u1ec3 t\u1ef1 \u0111\u1ed9ng h\u00f3a c\u01a1 s\u1edf d\u1eef li\u1ec7u.","og_url":"https:\/\/hoanghamobile.com\/tin-tuc\/trigger-la-gi\/","og_site_name":"Tin t\u1ee9c c\u00f4ng ngh\u1ec7 - HoangHaMobile","article_publisher":"https:\/\/www.facebook.com\/hoanghamobilecom","article_published_time":"2024-07-21T05:48:49+00:00","article_modified_time":"2025-10-18T12:27:53+00:00","og_image":[{"width":1200,"height":628,"url":"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2024\/07\/trigger-la-gi-9.jpg","type":"image\/jpeg"}],"author":"Vo Lan","twitter_card":"summary_large_image","twitter_misc":{"\u0110\u01b0\u1ee3c vi\u1ebft b\u1edfi":"Vo Lan","\u01af\u1edbc t\u00ednh th\u1eddi gian \u0111\u1ecdc":"15 ph\u00fat"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/hoanghamobile.com\/tin-tuc\/trigger-la-gi\/#article","isPartOf":{"@id":"https:\/\/hoanghamobile.com\/tin-tuc\/trigger-la-gi\/"},"author":{"name":"Vo Lan","@id":"https:\/\/hoanghamobile.com\/tin-tuc\/#\/schema\/person\/0a812d5b8175a4091883285291c094d0"},"headline":"Trigger l\u00e0 g\u00ec? Gi\u1ea3i m\u00e3 \u00fd ngh\u0129a trong m\u1ecdi l\u0129nh v\u1ef1c","datePublished":"2024-07-21T05:48:49+00:00","dateModified":"2025-10-18T12:27:53+00:00","mainEntityOfPage":{"@id":"https:\/\/hoanghamobile.com\/tin-tuc\/trigger-la-gi\/"},"wordCount":3789,"commentCount":0,"publisher":{"@id":"https:\/\/hoanghamobile.com\/tin-tuc\/#organization"},"image":{"@id":"https:\/\/hoanghamobile.com\/tin-tuc\/trigger-la-gi\/#primaryimage"},"thumbnailUrl":"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2024\/07\/trigger-la-gi-9.jpg","articleSection":["Kh\u00e1m Ph\u00e1","Ki\u1ebfn Th\u1ee9c"],"inLanguage":"vi","potentialAction":[{"@type":"CommentAction","name":"Comment","target":["https:\/\/hoanghamobile.com\/tin-tuc\/trigger-la-gi\/#respond"]}],"copyrightYear":"2024","copyrightHolder":{"@id":"https:\/\/hoanghamobile.com\/tin-tuc\/#organization"}},{"@type":"WebPage","@id":"https:\/\/hoanghamobile.com\/tin-tuc\/trigger-la-gi\/","url":"https:\/\/hoanghamobile.com\/tin-tuc\/trigger-la-gi\/","name":"Trigger l\u00e0 g\u00ec? T\u1eeb t\u00e2m l\u00fd h\u1ecdc, m\u1ea1ng x\u00e3 h\u1ed9i \u0111\u1ebfn Trigger trong SQL","isPartOf":{"@id":"https:\/\/hoanghamobile.com\/tin-tuc\/#website"},"primaryImageOfPage":{"@id":"https:\/\/hoanghamobile.com\/tin-tuc\/trigger-la-gi\/#primaryimage"},"image":{"@id":"https:\/\/hoanghamobile.com\/tin-tuc\/trigger-la-gi\/#primaryimage"},"thumbnailUrl":"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2024\/07\/trigger-la-gi-9.jpg","datePublished":"2024-07-21T05:48:49+00:00","dateModified":"2025-10-18T12:27:53+00:00","description":"Trigger l\u00e0 g\u00ec? C\u00f9ng t\u00ecm hi\u1ec3u \u00fd ngh\u0129a c\u1ee7a Trigger trong t\u00e2m l\u00fd h\u1ecdc (sang ch\u1ea5n), tr\u00ean m\u1ea1ng x\u00e3 h\u1ed9i v\u00e0 c\u00e1ch s\u1eed d\u1ee5ng Trigger trong SQL \u0111\u1ec3 t\u1ef1 \u0111\u1ed9ng h\u00f3a c\u01a1 s\u1edf d\u1eef li\u1ec7u.","breadcrumb":{"@id":"https:\/\/hoanghamobile.com\/tin-tuc\/trigger-la-gi\/#breadcrumb"},"inLanguage":"vi","potentialAction":[{"@type":"ReadAction","target":["https:\/\/hoanghamobile.com\/tin-tuc\/trigger-la-gi\/"]}]},{"@type":"ImageObject","inLanguage":"vi","@id":"https:\/\/hoanghamobile.com\/tin-tuc\/trigger-la-gi\/#primaryimage","url":"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2024\/07\/trigger-la-gi-9.jpg","contentUrl":"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2024\/07\/trigger-la-gi-9.jpg","width":1200,"height":628,"caption":"trigger-la-gi-y-cach-su-dung-trong-sql-9"},{"@type":"BreadcrumbList","@id":"https:\/\/hoanghamobile.com\/tin-tuc\/trigger-la-gi\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Trang ch\u1ee7","item":"https:\/\/hoanghamobile.com\/tin-tuc\/"},{"@type":"ListItem","position":2,"name":"Trigger l\u00e0 g\u00ec? Gi\u1ea3i m\u00e3 \u00fd ngh\u0129a trong m\u1ecdi l\u0129nh v\u1ef1c"}]},{"@type":"WebSite","@id":"https:\/\/hoanghamobile.com\/tin-tuc\/#website","url":"https:\/\/hoanghamobile.com\/tin-tuc\/","name":"Tin t\u1ee9c c\u00f4ng ngh\u1ec7 - HoangHaMobile","description":"","publisher":{"@id":"https:\/\/hoanghamobile.com\/tin-tuc\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/hoanghamobile.com\/tin-tuc\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"vi"},{"@type":"Organization","@id":"https:\/\/hoanghamobile.com\/tin-tuc\/#organization","name":"Tin t\u1ee9c c\u00f4ng ngh\u1ec7 - HoangHaMobile","url":"https:\/\/hoanghamobile.com\/tin-tuc\/","logo":{"@type":"ImageObject","inLanguage":"vi","@id":"https:\/\/hoanghamobile.com\/tin-tuc\/#\/schema\/logo\/image\/","url":"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2021\/12\/logo-text.png","contentUrl":"https:\/\/hoanghamobile.com\/tin-tuc\/wp-content\/uploads\/2021\/12\/logo-text.png","width":256,"height":37,"caption":"Tin t\u1ee9c c\u00f4ng ngh\u1ec7 - HoangHaMobile"},"image":{"@id":"https:\/\/hoanghamobile.com\/tin-tuc\/#\/schema\/logo\/image\/"},"sameAs":["https:\/\/www.facebook.com\/hoanghamobilecom"]},{"@type":"Person","@id":"https:\/\/hoanghamobile.com\/tin-tuc\/#\/schema\/person\/0a812d5b8175a4091883285291c094d0","name":"Vo Lan","image":{"@type":"ImageObject","inLanguage":"vi","@id":"https:\/\/hoanghamobile.com\/tin-tuc\/#\/schema\/person\/image\/","url":"https:\/\/secure.gravatar.com\/avatar\/fd70d1838a6fc3aa34a3a78f6253c3d4?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/fd70d1838a6fc3aa34a3a78f6253c3d4?s=96&d=mm&r=g","caption":"Vo Lan"},"url":"https:\/\/hoanghamobile.com\/tin-tuc\/author\/vo-lan\/"}]}},"_links":{"self":[{"href":"https:\/\/hoanghamobile.com\/tin-tuc\/wp-json\/wp\/v2\/posts\/368051","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/hoanghamobile.com\/tin-tuc\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/hoanghamobile.com\/tin-tuc\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/hoanghamobile.com\/tin-tuc\/wp-json\/wp\/v2\/users\/75"}],"replies":[{"embeddable":true,"href":"https:\/\/hoanghamobile.com\/tin-tuc\/wp-json\/wp\/v2\/comments?post=368051"}],"version-history":[{"count":0,"href":"https:\/\/hoanghamobile.com\/tin-tuc\/wp-json\/wp\/v2\/posts\/368051\/revisions"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/hoanghamobile.com\/tin-tuc\/wp-json\/wp\/v2\/media\/369057"}],"wp:attachment":[{"href":"https:\/\/hoanghamobile.com\/tin-tuc\/wp-json\/wp\/v2\/media?parent=368051"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/hoanghamobile.com\/tin-tuc\/wp-json\/wp\/v2\/categories?post=368051"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/hoanghamobile.com\/tin-tuc\/wp-json\/wp\/v2\/tags?post=368051"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}