{"id":7957,"date":"2023-10-07T23:27:35","date_gmt":"2023-10-07T16:27:35","guid":{"rendered":"https:\/\/teky.edu.vn\/blog\/?p=7957"},"modified":"2023-10-20T09:29:16","modified_gmt":"2023-10-20T02:29:16","slug":"ngon-ngu-sql","status":"publish","type":"post","link":"https:\/\/teky.edu.vn\/blog\/ngon-ngu-sql\/","title":{"rendered":"Ng\u00f4n ng\u1eef SQL l\u00e0 g\u00ec? Gi\u1edbi thi\u1ec7u m\u1ed9t s\u1ed1 l\u1ec7nh c\u01a1 b\u1ea3n c\u1ee7a SQL"},"content":{"rendered":"\n\n<div class=\"kk-star-ratings kksr-auto kksr-align-left kksr-valign-top\"\n    data-payload='{&quot;align&quot;:&quot;left&quot;,&quot;id&quot;:&quot;7957&quot;,&quot;slug&quot;:&quot;default&quot;,&quot;valign&quot;:&quot;top&quot;,&quot;ignore&quot;:&quot;&quot;,&quot;reference&quot;:&quot;auto&quot;,&quot;class&quot;:&quot;&quot;,&quot;count&quot;:&quot;12&quot;,&quot;legendonly&quot;:&quot;&quot;,&quot;readonly&quot;:&quot;&quot;,&quot;score&quot;:&quot;4.4&quot;,&quot;starsonly&quot;:&quot;&quot;,&quot;best&quot;:&quot;5&quot;,&quot;gap&quot;:&quot;5&quot;,&quot;greet&quot;:&quot;Rate this post&quot;,&quot;legend&quot;:&quot;4.4\\\/5 - (12 b\u00ecnh ch\u1ecdn)&quot;,&quot;size&quot;:&quot;24&quot;,&quot;title&quot;:&quot;Ng\u00f4n ng\u1eef SQL l\u00e0 g\u00ec? Gi\u1edbi thi\u1ec7u m\u1ed9t s\u1ed1 l\u1ec7nh c\u01a1 b\u1ea3n c\u1ee7a SQL&quot;,&quot;width&quot;:&quot;125.1&quot;,&quot;_legend&quot;:&quot;{score}\\\/{best} - ({count} {votes})&quot;,&quot;font_factor&quot;:&quot;1.25&quot;}'>\n            \n<div class=\"kksr-stars\">\n    \n<div class=\"kksr-stars-inactive\">\n            <div class=\"kksr-star\" data-star=\"1\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"2\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"3\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"4\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" data-star=\"5\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n    <\/div>\n    \n<div class=\"kksr-stars-active\" style=\"width: 125.1px;\">\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n            <div class=\"kksr-star\" style=\"padding-right: 5px\">\n            \n\n<div class=\"kksr-icon\" style=\"width: 24px; height: 24px;\"><\/div>\n        <\/div>\n    <\/div>\n<\/div>\n                \n\n<div class=\"kksr-legend\" style=\"font-size: 19.2px;\">\n            4.4\/5 - (12 b\u00ecnh ch\u1ecdn)    <\/div>\n    <\/div>\n<p style=\"text-align: justify;\"><em><span style=\"font-weight: 400;\">\u0110\u1ed1i v\u1edbi nh\u1eefng ng\u01b0\u1eddi l\u1eadp tr\u00ecnh vi\u00ean, hi\u1ec3u v\u00e0 c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng \u0111\u01b0\u1ee3c <strong>ng\u00f4n ng\u1eef SQL<\/strong> l\u00e0 v\u00f4 c\u00f9ng quan tr\u1ecdng. R\u1ea5t nhi\u1ec1u ng\u01b0\u1eddi mu\u1ed1n t\u00ecm hi\u1ec3u th\u00eam c\u00e1c th\u00f4ng tin li\u00ean quan v\u1ec1 SQL, ch\u1eb3ng h\u1ea1n nh\u01b0 SQL l\u00e0 g\u00ec, h\u1ecdc SQL \u0111\u1ec3 l\u00e0m g\u00ec, l\u1eadp tr\u00ecnh SQL nh\u01b0 th\u1ebf n\u00e0o hi\u1ec7u qu\u1ea3 nh\u1ea5t? N\u1ebfu b\u1ea1n c\u0169ng c\u00f3 chung nh\u1eefng th\u1eafc m\u1eafc n\u00e0y, v\u00e0 mu\u1ed1n t\u00ecm hi\u1ec3u th\u00eam th\u00f4ng tin chi ti\u1ebft, h\u00e3y \u0111\u1ecdc ngay b\u00e0i vi\u1ebft d\u01b0\u1edbi \u0111\u00e2y c\u1ee7a ch\u00fang t\u00f4i. Th\u00f4ng tin ch\u00fang t\u00f4i mang \u0111\u1ebfn cho b\u1ea1n v\u1ec1 SQL language ch\u1eafc ch\u1eafn c\u00f3 th\u1ec3 l\u00e0m cho b\u1ea1n h\u00e0i l\u00f2ng v\u00e0 \u00e1p d\u1ee5ng \u0111\u01b0\u1ee3c th\u00e0nh c\u00f4ng. T\u00ecm hi\u1ec3u ngay nh\u00e9!<\/span><\/em><\/p>\n<p><a href=\"https:\/\/lotrinhlaptrinh.teky.vn\/?utm_id=ContentBlog&amp;utm_medium=Click_Blog&amp;utm_source=ContentBlog\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-22416\" src=\"https:\/\/teky.edu.vn\/blog\/wp-content\/uploads\/2023\/10\/dang-ky-lap-trinh-teky.gif\" alt=\"dang-ky-lap-trinh\" width=\"600\" height=\"314\" \/><\/a><\/p>\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_76 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">N\u1ed9i dung <\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span 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href=\"https:\/\/teky.edu.vn\/blog\/ngon-ngu-sql\/#Ngon_ngu_SQL_la_gi\" >Ng\u00f4n ng\u1eef SQL l\u00e0 g\u00ec?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/teky.edu.vn\/blog\/ngon-ngu-sql\/#SQL_duoc_ap_dung_nhieu_o_dau\" >SQL \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng nhi\u1ec1u \u1edf \u0111\u00e2u?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/teky.edu.vn\/blog\/ngon-ngu-sql\/#Lich_su_hinh_thanh_ngon_ngu_SQL\" >L\u1ecbch s\u1eed h\u00ecnh th\u00e0nh ng\u00f4n ng\u1eef SQL<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/teky.edu.vn\/blog\/ngon-ngu-sql\/#Mot_so_cau_lenh_ngon_ngu_SQL_thuong_su_dung\" >M\u1ed9t s\u1ed1 c\u00e2u l\u1ec7nh ng\u00f4n ng\u1eef SQL th\u01b0\u1eddng s\u1eed d\u1ee5ng\u00a0<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a 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d\u1ee5ng trong ng\u00f4n ng\u1eef SQL<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/teky.edu.vn\/blog\/ngon-ngu-sql\/#Thuat_toan_su_dung_menh_de_AND_OR\" >Thu\u1eadt to\u00e1n s\u1eed d\u1ee5ng m\u1ec7nh \u0111\u1ec1 AND OR<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/teky.edu.vn\/blog\/ngon-ngu-sql\/#Cu_phap_su_dung_menh_de_WHERE\" >C\u00fa ph\u00e1p s\u1eed d\u1ee5ng m\u1ec7nh \u0111\u1ec1 WHERE<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/teky.edu.vn\/blog\/ngon-ngu-sql\/#Menh_de_Distinct\" >M\u1ec7nh \u0111\u1ec1 Distinct<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/teky.edu.vn\/blog\/ngon-ngu-sql\/#Menh_de_Group_By\" >M\u1ec7nh \u0111\u1ec1 Group By<\/a><\/li><li 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href=\"https:\/\/teky.edu.vn\/blog\/ngon-ngu-sql\/#Hoc_Vien_Cong_Nghe_Teky_%E2%80%93_Noi_con_phat_trien_ky_nang_tu_duy_lap_trinh\" >H\u1ecdc Vi\u1ec7n C\u00f4ng Ngh\u1ec7 Teky &#8211; N\u01a1i con ph\u00e1t tri\u1ec3n k\u1ef9 n\u0103ng, t\u01b0 duy l\u1eadp tr\u00ecnh\u00a0<\/a><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><ul class='ez-toc-list-level-4' ><li class='ez-toc-heading-level-4'><a class=\"ez-toc-link ez-toc-heading-18\" href=\"https:\/\/teky.edu.vn\/blog\/ngon-ngu-sql\/#Day_la_chuong_trinh_khong_chi_trang_bi_kien_thuc_lap_trinh_ma_con_ren_luyen_nhom_ky_nang_4Cs_Tre_se_duoc\" >\u0110\u00e2y l\u00e0 ch\u01b0\u01a1ng tr\u00ecnh kh\u00f4ng ch\u1ec9 trang b\u1ecb ki\u1ebfn th\u1ee9c l\u1eadp tr\u00ecnh m\u00e0 c\u00f2n r\u00e8n luy\u1ec7n nh\u00f3m k\u1ef9 n\u0103ng 4Cs. Tr\u1ebb s\u1ebd \u0111\u01b0\u1ee3c:<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-19\" href=\"https:\/\/teky.edu.vn\/blog\/ngon-ngu-sql\/#Lien_he_ngay_hoc_vien_cong_nghe_sang_tao_TEKY_de_duoc_tu_van_khoa_hoc\" >Li\u00ean h\u1ec7 ngay h\u1ecdc vi\u1ec7n c\u00f4ng ngh\u1ec7 s\u00e1ng t\u1ea1o TEKY \u0111\u1ec3 \u0111\u01b0\u1ee3c t\u01b0 v\u1ea5n kh\u00f3a h\u1ecdc:<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<h2 style=\"text-align: justify;\"><span class=\"ez-toc-section\" id=\"Ngon_ngu_SQL_la_gi\"><\/span><b>Ng\u00f4n ng\u1eef SQL l\u00e0 g\u00ec?<\/b><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">D\u00f9 r\u1eb1ng c\u00f3 nhi\u1ec1u ng\u01b0\u1eddi \u0111\u00e3 hi\u1ec3u v\u00e0 s\u1eed d\u1ee5ng th\u00f4ng th\u1ea1o lap trinh SQL, r\u1ea5t nhi\u1ec1u ng\u01b0\u1eddi t\u00f2 m\u00f2 kh\u00f4ng bi\u1ebft ng\u00f4n ng\u1eef SQL l\u00e0 g\u00ec, sql vi\u1ebft t\u1eaft c\u1ee7a t\u1eeb g\u00ec. T\u1eeb SQL l\u00e0 vi\u1ebft t\u1eaft c\u1ee7a c\u1ee5m Structured Query Language, c\u00f3 ngh\u0129a l\u00e0 lo\u1ea1i ng\u00f4n ng\u1eef truy v\u1ea5n c\u00f3 c\u1ea5u tr\u00fac. \u0110\u00e2y l\u00e0 m\u1ed9t lo\u1ea1i ng\u00f4n ng\u1eef m\u00e1y t\u00ednh v\u00f4 c\u00f9ng \u0111\u1eb7c th\u00f9, gi\u00fap h\u1ed7 tr\u1ee3 c\u00e1c thao t\u00e1c l\u01b0u tr\u1eef, truy xu\u1ea5t d\u1eef li\u1ec7u c\u00f9ng m\u1ed9t c\u01a1 s\u1edf d\u1eef li\u1ec7u quan h\u1ec7 m\u1ed9t c\u00e1ch v\u00f4 c\u00f9ng nhanh ch\u00f3ng.\u00a0<\/span><\/p>\n<p>&gt;&gt;&gt; xem th\u00eam: <a href=\"https:\/\/teky.edu.vn\/blog\/cau-lenh-sql\/\"><span data-sheets-value=\"{&quot;1&quot;:2,&quot;2&quot;:&quot;C\u00e2u l\u1ec7nh SQL c\u01a1 b\u1ea3n - H\u1ecdc IT kh\u00f4ng kh\u00f3 c\u00f9ng Teky&quot;}\" data-sheets-userformat=\"{&quot;2&quot;:4481,&quot;3&quot;:{&quot;1&quot;:0},&quot;10&quot;:2,&quot;11&quot;:0,&quot;15&quot;:&quot;Arial&quot;}\">C\u00e2u l\u1ec7nh SQL c\u01a1 b\u1ea3n &#8211; H\u1ecdc IT kh\u00f4ng kh\u00f3 c\u00f9ng Teky<\/span><\/a><\/p>\n<p>https:\/\/youtu.be\/f3zPeU3lU4M<\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">Ng\u00f4n ng\u1eef n\u00e0y \u0111\u00e3 \u0111\u01b0\u1ee3c ANSI &#8211; vi\u1ec7n ti\u00eau chu\u1ea9n qu\u1ed1c gia c\u1ee7a Hoa K\u1ef3 \u0111\u1eb7t ti\u00eau chu\u1ea9n h\u00f3a, v\u00e0 tr\u1edf th\u00e0nh m\u1ed9t ng\u00f4n ng\u1eef \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng v\u00f4 c\u00f9ng ph\u1ed5 bi\u1ebfn \u1edf trong c\u00e1c h\u1ec7 th\u1ed1ng c\u00f4ng ty c\u00f4ng ngh\u1ec7 c\u00f3 quy m\u00f4 v\u00f4 c\u00f9ng l\u1edbn.<\/span><\/p>\n<p><em><strong>&gt;&gt;&gt;\u00a0<\/strong>Xem th\u00eam: <a href=\"https:\/\/teky.edu.vn\/blog\/sql-injection-la-gi\/\"><span data-sheets-value=\"{&quot;1&quot;:2,&quot;2&quot;:&quot;SQL Injection l\u00e0 g\u00ec? 3 c\u00e1ch ph\u00f2ng ch\u1ed1ng SQL Injection hi\u1ec7u qu\u1ea3&quot;}\" data-sheets-userformat=\"{&quot;2&quot;:4481,&quot;3&quot;:{&quot;1&quot;:0},&quot;10&quot;:2,&quot;11&quot;:0,&quot;15&quot;:&quot;Arial&quot;}\">SQL Injection l\u00e0 g\u00ec? 3 c\u00e1ch ph\u00f2ng ch\u1ed1ng SQL Injection hi\u1ec7u qu\u1ea3<\/span><\/a><\/em><\/p>\n<h2 style=\"text-align: justify;\"><span class=\"ez-toc-section\" id=\"SQL_duoc_ap_dung_nhieu_o_dau\"><\/span><b>SQL \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng nhi\u1ec1u \u1edf \u0111\u00e2u?<\/b><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">Th\u1ef1c t\u1ebf, ng\u00f4n ng\u1eef pl\/sql l\u00e0 g\u00ec n\u00e0y \u0111\u01b0\u1ee3c ta s\u1eed d\u1ee5ng trong nhi\u1ec1u tr\u01b0\u1eddng h\u1ee3p kh\u00e1c nhau, \u0111\u1eb7c bi\u1ec7t l\u00e0 trong c\u00e1c b\u1ea3ng quy\u1ebft to\u00e1n, b\u1ea3ng l\u01b0\u01a1ng, danh s\u00e1ch ph\u00f2ng ban, nh\u00e2n vi\u00ean\u2026 Khi b\u1ea3ng n\u00e0y \u0111\u01b0\u1ee3c l\u01b0u l\u1ea1i th\u00e0nh CSDL th\u00ec ch\u00fang ta c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng SQL \u0111\u1ec3 c\u00f3 th\u1ec3 nhanh ch\u00f3ng ph\u00e2n t\u00edch, x\u1eed l\u00fd nh\u1eefng th\u00f4ng tin b\u00ean trong n\u00f3. Ta th\u1ea5y r\u1eb1ng k\u1ebft qu\u1ea3 th\u1ef1c hi\u1ec7n t\u1eeb SQL l\u00e0 m\u1ed9t b\u1ea3ng vi\u1ec7c m\u1edbi, gi\u00fap ti\u1ebfn h\u00e0nh x\u1eed l\u00fd nhanh ch\u00f3ng d\u1ec5 d\u00e0ng h\u01a1n.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">Ngo\u00e0i ra, SQL c\u00f2n \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng \u0111\u1ec3 c\u1eadp nh\u1eadt cho nh\u1eefng th\u00f4ng tin \u0111\u00e3 c\u00f3 tr\u01b0\u1edbc \u0111\u00f3. Vi\u1ec7c n\u00e0y \u0111\u01b0\u1ee3c x\u1eed l\u00fd r\u1ea5t nhanh ch\u00f3ng v\u00e0 \u0111\u1ea3m b\u1ea3o kh\u00f4ng c\u00f3 sai s\u00f3t, ho\u1eb7c l\u00e0 b\u1ecf l\u1eabn t\u1ed3n \u0111\u1ecdng n\u00e0o.<\/span><\/p>\n<figure id=\"attachment_7955\" aria-describedby=\"caption-attachment-7955\" style=\"width: 650px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"size-full wp-image-7955\" src=\"https:\/\/teky.edu.vn\/blog\/wp-content\/uploads\/2021\/07\/hoc-lap-trinh-sql-ra-sao.jpg\" alt=\"H\u1ecdc l\u1eadp tr\u00ecnh SQL ra sao?\" width=\"650\" height=\"400\" srcset=\"https:\/\/teky.edu.vn\/blog\/wp-content\/uploads\/2021\/07\/hoc-lap-trinh-sql-ra-sao.jpg 650w, https:\/\/teky.edu.vn\/blog\/wp-content\/uploads\/2021\/07\/hoc-lap-trinh-sql-ra-sao-400x246.jpg 400w\" sizes=\"auto, (max-width: 650px) 100vw, 650px\" \/><figcaption id=\"caption-attachment-7955\" class=\"wp-caption-text\">H\u1ecdc l\u1eadp tr\u00ecnh SQL ra sao?<\/figcaption><\/figure>\n<h2 style=\"text-align: justify;\"><span class=\"ez-toc-section\" id=\"Lich_su_hinh_thanh_ngon_ngu_SQL\"><\/span><b>L\u1ecbch s\u1eed h\u00ecnh th\u00e0nh ng\u00f4n ng\u1eef SQL<\/b><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">Nh\u1eafc t\u1edbi l\u1ecbch s\u1eed h\u00ecnh th\u00e0nh n\u00ean ng\u00f4n ng\u1eef SQL, c\u00f3 th\u1ec3 n\u00f3i r\u1eb1ng \u0111\u00f3 l\u00e0 c\u1ea3 m\u1ed9t qu\u00e1 tr\u00ecnh h\u00ecnh th\u00e0nh, ph\u00e1t tri\u1ec3n m\u1edf r\u1ed9ng. Ch\u00fang \u0111\u00e3 tr\u1ea3i qua nhi\u1ec1u giai \u0111o\u1ea1n \u0111\u1ed9t ph\u00e1 kh\u00e1c nhau, gi\u00fap ho\u00e0n thi\u1ec7n cho b\u1ed9 m\u00e1y ngon ngu SQL l\u00ean \u0111\u1ebfn t\u1ea7m \u0111\u1ed9t ph\u00e1 \u0111\u1ec9nh cao. M\u1ed9t s\u1ed1 d\u1ea5u m\u1ed1c quan tr\u1ecdng c\u00f3 th\u1ec3 k\u1ec3 \u0111\u1ebfn nh\u01b0 sau.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">V\u00e0o n\u0103m 1970, \u0111\u00e2y \u0111\u01b0\u1ee3c coi l\u00e0 c\u1ed9t m\u1ed1c l\u1ecbch s\u1eed \u0111\u1ea7u ti\u00ean trong qu\u00e1 tr\u00ecnh h\u00ecnh th\u00e0nh n\u00ean th\u1ee9 ng\u00f4n ng\u1eef m\u1edbi SQL. Cha \u0111\u1ebb cho c\u01a1 s\u1edf d\u1eef li\u1ec7u quan h\u1ec7 n\u00e0y ch\u00ednh l\u00e0 ng\u01b0\u1eddi c\u1ee7a IBM, \u00f4ng Dr.Edgar F.Ted Codd. \u00d4ng \u0111\u00e3 th\u1ef1c hi\u1ec7n n\u00ean nhi\u1ec1u mi\u00eau t\u1ea3 cho m\u1ed1i quan h\u1ec7 gi\u1eefa c\u00e1c Database.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">V\u00e0o n\u0103m 1974, l\u1ea7n \u0111\u1ea7u xu\u1ea5t hi\u1ec7n thu\u1eadt ng\u1eef SQL v\u00e0 \u0111\u01b0\u1ee3c nhi\u1ec1u ng\u01b0\u1eddi bi\u1ebft \u0111\u1ebfn h\u01a1n nh\u1edd m\u00f4 h\u00ecnh \u0111\u01b0\u1ee3c mi\u00eau t\u1ea3.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">Cho \u0111\u1ebfn n\u0103m 1978, IBM c\u00f4ng b\u1ed1 s\u1ea3n ph\u1ea9m System\/R d\u1ef1a v\u00e0o vi\u1ec7c ti\u1ebfp t\u1ee5c ph\u00e1t tri\u1ec3n, c\u0169ng nh\u01b0 ho\u00e0n thi\u1ec7n nh\u1eefng \u00fd t\u01b0\u1edfng m\u1edbi c\u1ee7a F.Ted Codd.\u00a0<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">Ti\u1ebfp \u0111\u1ebfn n\u0103m 1986, \u0111\u00e2y l\u00e0 n\u0103m \u0111\u01b0\u1ee3c coi l\u00e0 ho\u00e0n thi\u1ec7n c\u1ea3 v\u1ec1 ng\u00f4n ng\u1eef c\u0169ng nh\u01b0 c\u01a1 s\u1edf d\u1eef li\u1ec7u quan h\u1ec7. V\u00e0o n\u0103m n\u00e0y, IBM \u0111\u00e3 th\u1ef1c hi\u1ec7n ho\u00e0n ch\u1ec9nh nguy\u00ean m\u1eabu \u0111\u1ea7u ti\u00ean \u0111\u01b0\u1ee3c ANSI chu\u1ea9n h\u00f3a. Ngo\u00e0i ra, Relational Database c\u0169ng \u0111\u01b0\u1ee3c c\u00f4ng b\u1ed1 v\u1edbi Relational Software v\u1edbi Oracle v\u00e0o m\u1ed9t th\u1eddi gian sau \u0111\u00f3. Kh\u00f4ng kh\u00f3 hi\u1ec3u t\u1ea1i sao v\u00e0o th\u1eddi gian n\u00e0y l\u1ea1i c\u00f3 s\u1ef1 b\u00f9ng n\u1ed5 v\u1ec1 vi\u1ec7c t\u00ecm hi\u1ec3u h\u1ecdc SQL \u1edf \u0111\u00e2u, v\u00e0 cho \u0111\u1ebfn hi\u1ec7n t\u1ea1i l\u01b0\u1ee3t truy c\u1eadp v\u00e0o c\u00e1c t\u00e0i li\u1ec7u SQL server v\u1eabn l\u00e0 r\u1ea5t l\u1edbn.<\/span><\/p>\n<p><em><strong>&gt;&gt;&gt;M\u1eddi b\u1ea1n tham kh\u1ea3o th\u00eam:<\/strong> <a href=\"https:\/\/teky.edu.vn\/blog\/sql-la-gi\/\"><span data-sheets-value=\"{&quot;1&quot;:2,&quot;2&quot;:&quot;SQL l\u00e0 g\u00ec? T\u1ea1i sao b\u1ea1n n\u00ean h\u1ecdc ph\u01b0\u01a1ng ph\u00e1p l\u1eadp tr\u00ecnh SQL?&quot;}\" data-sheets-userformat=\"{&quot;2&quot;:4481,&quot;3&quot;:{&quot;1&quot;:0},&quot;10&quot;:2,&quot;11&quot;:0,&quot;15&quot;:&quot;Arial&quot;}\">SQL l\u00e0 g\u00ec? T\u1ea1i sao b\u1ea1n n\u00ean h\u1ecdc ph\u01b0\u01a1ng ph\u00e1p l\u1eadp tr\u00ecnh SQL?<\/span><\/a><\/em><\/p>\n<h2 style=\"text-align: justify;\"><span class=\"ez-toc-section\" id=\"Mot_so_cau_lenh_ngon_ngu_SQL_thuong_su_dung\"><\/span><b>M\u1ed9t s\u1ed1 c\u00e2u l\u1ec7nh ng\u00f4n ng\u1eef SQL th\u01b0\u1eddng s\u1eed d\u1ee5ng\u00a0<\/b><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">D\u01b0\u1edbi \u0111\u00e2y l\u00e0 m\u1ed9t s\u1ed1 c\u00e2u l\u1ec7nh th\u01b0\u1eddng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng b\u00ean trong ng\u00f4n ng\u1eef SQL. N\u1ebfu nh\u01b0 b\u1ea1n mu\u1ed1n n\u1eafm r\u00f5 th\u00eam SQL la gi, ch\u1eafc ch\u1eafn b\u1ea1n kh\u00f4ng th\u1ec3 b\u1ecf qua nh\u1eefng th\u00f4ng tin d\u01b0\u1edbi \u0111\u00e2y.<\/span><\/p>\n<h3 style=\"text-align: justify;\"><span class=\"ez-toc-section\" id=\"Ngon_ngu_dieu_khien_du_lieu_DCL\"><\/span><b>Ng\u00f4n ng\u1eef \u0111i\u1ec1u khi\u1ec3n d\u1eef li\u1ec7u DCL<\/b><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">DCL c\u1ee7a ng\u00f4n ng\u1eef SQL s\u1ebd g\u1ed3m c\u00f3 nh\u1eefng l\u1ec7nh sau:<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">GRANT: \u0110\u00e2y l\u00e0 l\u1ec7nh \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng khi mu\u1ed1n trao quy\u1ec1n cho ng\u01b0\u1eddi d\u00f9ng<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">REVOKE: \u0110\u00e2y l\u00e0 l\u1ec7nh \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng khi mu\u1ed1n thu h\u1ed3i l\u1ea1i quy\u1ec1n \u0111\u00e3 trao cho ng\u01b0\u1eddi s\u1eed d\u1ee5ng.<\/span><\/p>\n<h3 style=\"text-align: justify;\"><span class=\"ez-toc-section\" id=\"Ngon_ngu_su_dung_thao_tac_du_lieu_DML_cua_ngon_ngu_SQL\"><\/span><b>Ng\u00f4n ng\u1eef s\u1eed d\u1ee5ng thao t\u00e1c d\u1eef li\u1ec7u DML c\u1ee7a ng\u00f4n ng\u1eef SQL<\/b><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">Nh\u1eafc \u0111\u1ebfn thao t\u00e1c d\u1eef li\u1ec7u tr\u00ean DML hay c\u00f2n bi\u1ebft \u0111\u1ebfn l\u00e0 Data Manipulation Language, ch\u1eafc ch\u1eafn kh\u00f4ng th\u1ec3 b\u1ecf qua m\u1ed9t s\u1ed1 l\u1ec7nh sau:<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">SELECT: \u0110\u00e2y l\u00e0 l\u1ec7nh th\u01b0\u1eddng \u0111\u01b0\u1ee3c d\u00f9ng khi mu\u1ed1n l\u1ea5y m\u1ed9t ho\u1eb7c m\u1ed9t v\u00e0i b\u1ea3n ghi nh\u1ea5t \u0111\u1ecbnh, c\u00f3 t\u1eeb m\u1ed9t ho\u1eb7c nhi\u1ec1u b\u1ea3ng kh\u00e1c nhau.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">INSERT: \u0110\u01b0\u1ee3c s\u1eed d\u1ee5ng khi b\u1ea1n mu\u1ed1n t\u1ea1o n\u00ean m\u1ed9t b\u1ea3n ghi<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">UPDATE: L\u1ec7nh n\u00e0y s\u1ebd \u0111\u01b0\u1ee3c th\u1ef1c hi\u1ec7n n\u1ebfu b\u1ea1n mu\u1ed1n ch\u1ec9nh s\u1eeda m\u1ed9t b\u1ea3n ghi<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">DELETE: \u0110\u00e2y l\u00e0 l\u1ec7nh \u0111\u01b0\u1ee3c nhi\u1ec1u ng\u01b0\u1eddi bi\u1ebft t\u1edbi, n\u00f3 \u0111\u01b0\u1ee3c d\u00f9ng n\u1ebfu b\u1ea1n mu\u1ed1n x\u00f3a b\u1ea3n ghi.<\/span><\/p>\n<figure id=\"attachment_7956\" aria-describedby=\"caption-attachment-7956\" style=\"width: 650px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-7956 size-full\" src=\"https:\/\/teky.edu.vn\/blog\/wp-content\/uploads\/2021\/07\/giai-ma-thong-tin-ve-sql.jpg\" alt=\"Gi\u1ea3i m\u00e3 th\u00f4ng tin v\u1ec1 SQL l\u00e0 g\u00ec?\" width=\"650\" height=\"400\" srcset=\"https:\/\/teky.edu.vn\/blog\/wp-content\/uploads\/2021\/07\/giai-ma-thong-tin-ve-sql.jpg 650w, https:\/\/teky.edu.vn\/blog\/wp-content\/uploads\/2021\/07\/giai-ma-thong-tin-ve-sql-400x246.jpg 400w\" sizes=\"auto, (max-width: 650px) 100vw, 650px\" \/><figcaption id=\"caption-attachment-7956\" class=\"wp-caption-text\">Gi\u1ea3i m\u00e3 th\u00f4ng tin v\u1ec1 SQL l\u00e0 g\u00ec?<\/figcaption><\/figure>\n<h3 style=\"text-align: justify;\"><span class=\"ez-toc-section\" id=\"Ngon_ngu_DDL\"><\/span><a href=\"https:\/\/vi.wikipedia.org\/wiki\/Dynamic_Link_Library\" rel=\"nofollow noreferrer\"><b>Ng\u00f4n ng\u1eef DDL<\/b><\/a><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">DDL l\u00e0 vi\u1ebft t\u1eaft c\u1ee7a t\u1eeb Data Definition Language. C\u1ee5m n\u00e0y g\u1ed3m c\u00f3 c\u00e1c l\u1ec7nh nh\u01b0 sau:<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">CREATE: Gi\u00fap t\u1ea1o ra m\u1ed9t b\u1ea3ng m\u1edbi, m\u1ed9t view m\u1edbi c\u1ee7a m\u1ed9t b\u1ea3ng ho\u1eb7c l\u00e0 c\u1ee7a c\u00e1c \u0111\u1ed1i t\u01b0\u1ee3ng kh\u00e1c nhau trong c\u00f9ng m\u1ed9t Database.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">ALTER: \u0110\u01b0\u1ee3c s\u1eed d\u1ee5ng khi mu\u1ed1n s\u1eeda \u0111\u1ed5i \u0111\u1ed1i t\u01b0\u1ee3ng khi \u0111\u00e3 t\u1ed3n t\u1ea1i b\u00ean trong m\u1ed9t Database.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">DROP: L\u1ec7nh n\u00e0y \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng n\u1ebfu b\u1ea1n mu\u1ed1n x\u00f3a b\u1ea3ng, x\u00f3a view c\u1ee7a m\u1ed9t b\u1ea3n ho\u1eb7c l\u00e0 c\u1ee7a m\u1ed9t \u0111\u1ed1i t\u01b0\u1ee3ng kh\u00e1c b\u00ean trong Database \u0111\u00f3.<\/span><\/p>\n<p><a href=\"https:\/\/lotrinhlaptrinh.teky.vn\/?utm_id=ContentBlog&amp;utm_medium=Click_Blog&amp;utm_source=ContentBlog\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-22417\" src=\"https:\/\/teky.edu.vn\/blog\/wp-content\/uploads\/2023\/10\/dang-ky-lap-trinh-teky1.gif\" alt=\"dang-ky-lap-trinh-teky1\" width=\"600\" height=\"314\" \/><\/a><\/p>\n<h2 style=\"text-align: justify;\"><span class=\"ez-toc-section\" id=\"Mot_so_cu_phap_truy_van_thuong_su_dung_trong_ngon_ngu_SQL\"><\/span><b>M\u1ed9t s\u1ed1 c\u00fa ph\u00e1p truy v\u1ea5n th\u01b0\u1eddng s\u1eed d\u1ee5ng trong ng\u00f4n ng\u1eef SQL<\/b><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h3 style=\"text-align: justify;\"><span class=\"ez-toc-section\" id=\"Thuat_toan_su_dung_menh_de_AND_OR\"><\/span><b>Thu\u1eadt to\u00e1n s\u1eed d\u1ee5ng m\u1ec7nh \u0111\u1ec1 AND OR<\/b><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">V\u1edbi thu\u1eadt to\u00e1n n\u00e0y, b\u1ea1n c\u1ea7n ph\u1ea3i k\u1ebft h\u1ee3p nhi\u1ec1u \u0111i\u1ec1u ki\u1ec7n kh\u00e1c nhau trong ng\u00f4n ng\u1eef SQL. \u0110\u00e2y l\u00e0 ch\u1ee9c n\u0103ng ch\u00ednh c\u1ee7a m\u1ec7nh \u0111\u1ec1 n\u00e0y.<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">C\u00fa ph\u00e1p m\u00e0 b\u1ea1n c\u1ea7n t\u1ea1o:<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">B\u01b0\u1edbc 1: SELECT cot1, cot2, cotN<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">B\u01b0\u1edbc 2: FROM ten_bang<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">B\u01b0\u1edbc 3: WHERE [dieu_kien_1] AND [dieu_kien_2]\u2026AND [dieu_kien_N];<\/span><\/p>\n<h3 style=\"text-align: justify;\"><span class=\"ez-toc-section\" id=\"Cu_phap_su_dung_menh_de_WHERE\"><\/span><b>C\u00fa ph\u00e1p s\u1eed d\u1ee5ng m\u1ec7nh \u0111\u1ec1 WHERE<\/b><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">M\u1ec7nh \u0111\u1ec1 n\u00e0y \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng gi\u00fap x\u00e1c \u0111\u1ecbnh \u0111i\u1ec1u ki\u1ec7n khi l\u1ea5y m\u1ed9t s\u1ed1 d\u1eef li\u1ec7u \u1edf b\u00ean trong b\u1ea3ng. C\u00fa ph\u00e1p c\u1ee7a ch\u00fang bao g\u1ed3m:\u00a0<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">B\u01b0\u1edbc 1: SELECT cot1, cot2, cotN<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">B\u01b0\u1edbc 2: FROM ten_bang<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">B\u01b0\u1edbc 3: WHERE [dieu_kien]<\/span><\/p>\n<h3 style=\"text-align: justify;\"><span class=\"ez-toc-section\" id=\"Menh_de_Distinct\"><\/span><b>M\u1ec7nh \u0111\u1ec1 Distinct<\/b><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">B\u01b0\u1edbc 1: <\/span><span style=\"font-weight: 400;\">SELECT DISTINCT cot1, cot2, \u2026cotN<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">B\u01b0\u1edbc 2: FROM ten_bang<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">B\u01b0\u1edbc 3: WHERE [dieu_kien]<\/span><\/p>\n<h3 style=\"text-align: justify;\"><span class=\"ez-toc-section\" id=\"Menh_de_Group_By\"><\/span><b>M\u1ec7nh \u0111\u1ec1 Group By<\/b><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">C\u00fa ph\u00e1p c\u1ee7a m\u1ec7nh \u0111\u1ec1 n\u00e0y khi d\u00f9ng trong ng\u00f4n ng\u1eef SQL c\u00f3 ph\u1ea7n ph\u1ee9c t\u1ea1p h\u01a1n, tuy nhi\u00ean v\u1eabn d\u1ec5 d\u00e0ng \u0111\u1ec3 b\u1ea1n c\u00f3 th\u1ec3 hi\u1ec3u v\u00e0 \u00e1p d\u1ee5ng nhanh ch\u00f3ng:<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">B\u01b0\u1edbc 1: SELECT cot1, cot2<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">B\u01b0\u1edbc 2: FROM ten_bang<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">B\u01b0\u1edbc 3: WHERE [dieu_kien]<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">B\u01b0\u1edbc 4: GROUP BY cot1, cot2<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">B\u01b0\u1edbc 5: ORDER BY cot1, cot2<\/span><\/p>\n<h3 style=\"text-align: justify;\"><span class=\"ez-toc-section\" id=\"Menh_de_Order_By\"><\/span><b>M\u1ec7nh \u0111\u1ec1 Order By<\/b><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">Th\u00f4ng tin v\u1ec1 ng\u00f4n ng\u1eef SQL trong m\u1ec7nh \u0111\u1ec1 Order By \u0111\u01b0\u1ee3c mang \u0111\u1ebfn nh\u01b0 sau:<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">B\u01b0\u1edbc 1: SELECT danh_sach_cot<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">B\u01b0\u1edbc 2: FROM ten_bang<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">B\u01b0\u1edbc 3: [WHERE dieu_kien]<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">B\u01b0\u1edbc 4: [ORDER BY cot1, cot2, \u2026cotN] [ASC | DESC];<\/span><\/p>\n<h3 style=\"text-align: justify;\"><span class=\"ez-toc-section\" id=\"Truy_van_Select\"><\/span><b>Truy v\u1ea5n Select<\/b><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">\u0110\u1ed1i v\u1edbi truy v\u1ea5n n\u00e0y, n\u1ebfu b\u1ea1n mu\u1ed1n x\u00e1c \u0111\u1ecbnh c\u00e1c c\u1ed9t c\u00f3 gi\u00e1 tr\u1ecb mu\u1ed1n l\u1ea5y, b\u1ea1n nh\u1eadp nh\u01b0 sau: <\/span><span style=\"font-weight: 400;\">SELECT cot1, cot2, cotN FROM ten_bang;<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">C\u00f2n n\u1ebfu b\u1ea1n mu\u1ed1n x\u00e1c \u0111\u1ecbnh \u0111\u01b0\u1ee3c thao t\u00e1c c\u1ee7a t\u1ea5t c\u1ea3 c\u00e1c c\u1ed9t, b\u1ea1n s\u1ebd nh\u1eadp nh\u01b0 sau: <\/span><span style=\"font-weight: 400;\">SELECT * FROM ten_bang;<\/span><\/p>\n<h3 style=\"text-align: justify;\"><span class=\"ez-toc-section\" id=\"Truy_van_Insert\"><\/span><b>Truy v\u1ea5n Insert<\/b><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">C\u00fa ph\u00e1p \u0111\u1ec3 x\u00e1c \u0111\u1ecbnh \u0111\u01b0\u1ee3c c\u1ed9t ch\u00e8n d\u1eef li\u1ec7u l\u00e0\u201d\u00a0<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">INSERT INTO TABLE_TEN (cot1, cot2, cot3, \u2026. CotN)<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">VALUES (giaitri1, giaitri2, giaitri3, \u2026giatriN)<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">Thao t\u00e1c \u0111\u01b0\u1ee3c \u00e1p d\u1ee5ng tr\u00ean t\u1ea5t c\u1ea3 c\u00e1c c\u1ed9t c\u00f3 trong b\u1ea3ng l\u00e0:<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">INSERT INTO TABLE_TEN VALUES (giaitri1,giaitri2,giaitri3,\u2026giaitriN)<\/span><\/p>\n<p><a href=\"https:\/\/lotrinhlaptrinh.teky.vn\/?utm_id=ContentBlog&amp;utm_medium=Click_Blog&amp;utm_source=ContentBlog\"><img loading=\"lazy\" decoding=\"async\" class=\"aligncenter size-full wp-image-22422\" src=\"https:\/\/teky.edu.vn\/blog\/wp-content\/uploads\/2023\/10\/lap-trinh-cho-tre.gif\" alt=\"lap-trinh-cho-tre\" width=\"600\" height=\"314\" \/><\/a><\/p>\n<h3 style=\"text-align: justify;\"><span class=\"ez-toc-section\" id=\"Truy_van_Update_%E2%80%93_SQL_la_gi\"><\/span><b>Truy v\u1ea5n Update &#8211; SQL l\u00e0 g\u00ec?<\/b><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">Nh\u1eafc \u0111\u1ebfn truy v\u1ea5n Update, c\u00fa ph\u00e1p \u0111\u1ec3 ch\u00e8n \u0111\u1ed1i v\u1edbi ng\u00f4n ng\u1eef SQL c\u0169ng kh\u00f4ng g\u00e2y ra nhi\u1ec1u kh\u00f3 kh\u0103n. B\u1ea1n c\u00f3 th\u1ec3 t\u00ecm hi\u1ec3u ngay nh\u01b0 sau:<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">B\u01b0\u1edbc 1: UPDATE: ten_bang<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">B\u01b0\u1edbc 2: SET cot1 = giaitri1, cot2 = giaitri2, cotN = giaitriN<\/span><\/p>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">B\u01b0\u1edbc 3: WHERE [dieu_kien]<\/span><\/p>\n<figure id=\"attachment_7954\" aria-describedby=\"caption-attachment-7954\" style=\"width: 650px\" class=\"wp-caption aligncenter\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-7954 size-full\" src=\"https:\/\/teky.edu.vn\/blog\/wp-content\/uploads\/2021\/07\/nhieu-thac-mac-ve-ngon-ngu-nay-tu-ban-doc.jpg\" alt=\"Nhi\u1ec1u th\u1eafc m\u1eafc v\u1ec1 ng\u00f4n ng\u1eef n\u00e0y t\u1eeb b\u1ea1n \u0111\u1ecdc\" width=\"650\" height=\"400\" srcset=\"https:\/\/teky.edu.vn\/blog\/wp-content\/uploads\/2021\/07\/nhieu-thac-mac-ve-ngon-ngu-nay-tu-ban-doc.jpg 650w, https:\/\/teky.edu.vn\/blog\/wp-content\/uploads\/2021\/07\/nhieu-thac-mac-ve-ngon-ngu-nay-tu-ban-doc-400x246.jpg 400w\" sizes=\"auto, (max-width: 650px) 100vw, 650px\" \/><figcaption id=\"caption-attachment-7954\" class=\"wp-caption-text\">Nhi\u1ec1u th\u1eafc m\u1eafc v\u1ec1 ng\u00f4n ng\u1eef n\u00e0y t\u1eeb b\u1ea1n \u0111\u1ecdc &#8211; Ng\u00f4n ng\u1eef SQL l\u00e0 g\u00ec?<\/figcaption><\/figure>\n<p style=\"text-align: justify;\"><span style=\"font-weight: 400;\">Tr\u00ean \u0111\u00e2y l\u00e0 nh\u1eefng th\u00f4ng tin m\u00e0 ch\u00fang t\u00f4i mang \u0111\u1ebfn cho b\u1ea1n \u0111\u1ecdc v\u1ec1 ng\u00f4n ng\u1eef SQL, ngo\u00e0i ra gi\u1edbi thi\u1ec7u cho b\u1ea1n m\u1ed9t s\u1ed1 l\u1ec7nh, truy v\u1ea5n hay g\u1eb7p \u0111\u1ec3 b\u1ea1n c\u00f3 th\u1ec3 \u00e1p d\u1ee5ng. N\u1ebfu b\u1ea1n th\u1ea5y nh\u1eefng chia s\u1ebb n\u00e0y th\u00fa v\u1ecb v\u00e0 b\u1ed5 \u00edch, h\u00e3y gi\u00fap ch\u00fang t\u00f4i chia s\u1ebb r\u1ed9ng r\u00e3i t\u1edbi nhi\u1ec1u b\u1ea1n \u0111\u1ecdc kh\u00e1c h\u01a1n n\u1eefa nh\u00e9. Ngo\u00e0i ra, \u0111\u1eebng qu\u00ean tham kh\u1ea3o th\u00eam nh\u1eefng th\u00f4ng tin b\u1ed5 \u00edch kh\u00e1c t\u1eeb Teky, v\u00ed d\u1ee5 b\u00e0i vi\u1ebft t\u00ecm hi\u1ec3u v\u1ec1 <\/span><a href=\"https:\/\/teky.edu.vn\/blog\/business-analyst-la-gi\/\"><span style=\"font-weight: 400;\">Business Analyst l\u00e0 g\u00ec<\/span><\/a><span style=\"font-weight: 400;\"> b\u1ea1n nh\u00e9. Ch\u1eafc ch\u1eafn b\u1ea1n s\u1ebd kh\u00f4ng th\u1ea5t v\u1ecdng v\u1edbi nh\u1eefng th\u00f4ng tin m\u00e0 m\u00ecnh nh\u1eadn \u0111\u01b0\u1ee3c \u0111\u00e2u.<\/span><\/p>\n<p>&nbsp;<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Hoc_Vien_Cong_Nghe_Teky_%E2%80%93_Noi_con_phat_trien_ky_nang_tu_duy_lap_trinh\"><\/span><span style=\"font-size: 24px; color: #339966;\" data-sheets-value=\"{&quot;1&quot;:2,&quot;2&quot;:&quot;C\u00f9ng T\u00ecm Hi\u1ec3u V\u1ec1 Teky H\u1ecdc Vi\u1ec7n 5 sao \u0110\u00e0o T\u1ea1o Tr\u1ebb Em H\u1ecdc L\u1eadp Tr\u00ecnh (4-18 tu\u1ed5i)&quot;}\" data-sheets-userformat=\"{&quot;2&quot;:17153,&quot;3&quot;:{&quot;1&quot;:0},&quot;11&quot;:4,&quot;12&quot;:0,&quot;17&quot;:1}\">H\u1ecdc Vi\u1ec7n C\u00f4ng Ngh\u1ec7 Teky &#8211; N\u01a1i con ph\u00e1t tri\u1ec3n k\u1ef9 n\u0103ng, t\u01b0 duy l\u1eadp tr\u00ecnh\u00a0<\/span><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p><iframe loading=\"lazy\" title=\"H\u1ecdc l\u1eadp tr\u00ecnh tr\u1ebb em \u1edf \u0111\u00e2u? - Gi\u1edbi thi\u1ec7u h\u1ecdc vi\u1ec7n c\u00f4ng ngh\u1ec7 TEKY h\u00e0ng \u0111\u1ea7u Vi\u1ec7t Nam\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/kGgr0XJAxFM?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe><\/p>\n<p><strong>TEKY l\u00e0 H\u1ecdc vi\u1ec7n s\u00e1ng t\u1ea1o c\u00f4ng ngh\u1ec7<\/strong> v\u1edbi ch\u01b0\u01a1ng tr\u00ecnh gi\u1ea3ng d\u1ea1y STEAM (Science \u2013 Technology \u2013 Engineering \u2013 Art \u2013 Mathematics) theo chu\u1ea9n M\u1ef9 \u0111\u1ea7u ti\u00ean t\u1ea1i Vi\u1ec7t Nam d\u00e0nh cho tr\u1ebb em t\u1eeb 4 \u0111\u1ebfn 18 tu\u1ed5i.<\/p>\n<p>\u0110\u01b0\u1ee3c th\u00e0nh l\u1eadp v\u00e0o th\u00e1ng 6 n\u0103m 2016, TEKY quy\u1ebft t\u00e2m th\u1ef1c hi\u1ec7n s\u1ee9 m\u1ec7nh mang \u0111\u1ebfn cho th\u1ebf h\u1ec7 tr\u1ebb Vi\u1ec7t Nam ki\u1ebfn th\u1ee9c to\u00e0n di\u1ec7n v\u1ec1 STEAM, \u0111\u1eb7c bi\u1ec7t l\u00e0 c\u00e1c t\u01b0 duy c\u00f4ng ngh\u1ec7, khoa h\u1ecdc m\u00e1y t\u00ednh v\u00e0 k\u1ef9 n\u0103ng th\u1ebf k\u1ef7 21 \u2013 4Cs (Critical Thinking: T\u01b0 duy ph\u1ea3n bi\u1ec7n \u2013 Communication: Giao ti\u1ebfp \u2013 Creativity: S\u00e1ng t\u1ea1o \u2013 Collaboration: L\u00e0m vi\u1ec7c nh\u00f3m).<\/p>\n<figure id=\"attachment_14828\" aria-describedby=\"caption-attachment-14828\" style=\"width: 600px\" class=\"wp-caption aligncenter\"><a href=\"https:\/\/teky.edu.vn\/?utm_source=Blog&amp;utm_medium=baiviet\"><img loading=\"lazy\" decoding=\"async\" class=\"wp-image-14828 size-full\" src=\"https:\/\/teky.edu.vn\/blog\/wp-content\/uploads\/2021\/03\/Trai-nghiem-hoc-lap-trinh-mien-phi.jpg\" alt=\"Tr\u1ea3i nghi\u1ec7m h\u1ecdc l\u1eadp tr\u00ecnh mi\u1ec5n ph\u00ed\" width=\"600\" height=\"400\" srcset=\"https:\/\/teky.edu.vn\/blog\/wp-content\/uploads\/2021\/03\/Trai-nghiem-hoc-lap-trinh-mien-phi.jpg 600w, https:\/\/teky.edu.vn\/blog\/wp-content\/uploads\/2021\/03\/Trai-nghiem-hoc-lap-trinh-mien-phi-400x267.jpg 400w, https:\/\/teky.edu.vn\/blog\/wp-content\/uploads\/2021\/03\/Trai-nghiem-hoc-lap-trinh-mien-phi-272x182.jpg 272w\" sizes=\"auto, (max-width: 600px) 100vw, 600px\" \/><\/a><figcaption id=\"caption-attachment-14828\" class=\"wp-caption-text\">Tr\u1ea3i nghi\u1ec7m h\u1ecdc l\u1eadp tr\u00ecnh mi\u1ec5n ph\u00ed<\/figcaption><\/figure>\n<h4><span class=\"ez-toc-section\" id=\"Day_la_chuong_trinh_khong_chi_trang_bi_kien_thuc_lap_trinh_ma_con_ren_luyen_nhom_ky_nang_4Cs_Tre_se_duoc\"><\/span>\u0110\u00e2y l\u00e0 ch\u01b0\u01a1ng tr\u00ecnh kh\u00f4ng ch\u1ec9 trang b\u1ecb ki\u1ebfn th\u1ee9c l\u1eadp tr\u00ecnh m\u00e0 c\u00f2n r\u00e8n luy\u1ec7n nh\u00f3m k\u1ef9 n\u0103ng 4Cs. Tr\u1ebb s\u1ebd \u0111\u01b0\u1ee3c:<span class=\"ez-toc-section-end\"><\/span><\/h4>\n<ul>\n<li>\u00a0H\u1ecdc t\u01b0 duy ph\u1ea3n bi\u1ec7n th\u00f4ng qua vi\u1ec7c ph\u00e2n t\u00edch c\u00e1c v\u1ea5n \u0111\u1ec1.<\/li>\n<li>\u00a0H\u1ecdc t\u00ednh s\u00e1ng t\u1ea1o t\u01b0 duy Logic th\u00f4ng qua vi\u1ec7c l\u1eafp \u0111\u1eb7t v\u00e0 l\u1eadp tr\u00ecnh robot th \u00f4ng qua c\u00e1c m\u00f4 h\u00ecnh Lego Mindstorm, app tr\u00f2 ch\u01a1i. Gi\u00fap con h\u1ecdc gi\u1ecfi m\u00f4n To\u00e1n tr\u00ean l\u1edbp<\/li>\n<li>\u00a0K\u1ef9 n\u0103ng h\u1ee3p t\u00e1c th\u00f4ng qua c\u00e1c tr\u00f2 ch\u01a1i team-building, c\u00e1c d\u1ef1 \u00e1n nh\u00f3m tr\u00ean l\u1edbp.<\/li>\n<li>\u00a0Ph\u00e1t huy kh\u1ea3 n\u0103ng giao ti\u1ebfp hi\u1ec7u qu\u1ea3 b\u1eb1ng nhi\u1ec1u b\u00e0i t\u1eadp v\u00e0 ho\u1ea1t \u0111\u1ed9ng h\u1ea5p d\u1eabn.<\/li>\n<\/ul>\n<p><iframe loading=\"lazy\" title=\"Shark Nguy\u1ec5n Ho\u00e0 B\u00ecnh \u0111\u1ed3ng h\u00e0nh c\u00f9ng con h\u1ecdc l\u1eadp tr\u00ecnh t\u1ea1i h\u1ecdc vi\u1ec7n c\u00f4ng ngh\u1ec7 Teky h\u00e0ng \u0111\u1ea7u Vi\u1ec7t Nam\" width=\"500\" height=\"281\" src=\"https:\/\/www.youtube.com\/embed\/q6QbqIs6ll8?feature=oembed\" frameborder=\"0\" allow=\"accelerometer; autoplay; clipboard-write; encrypted-media; gyroscope; picture-in-picture; web-share\" referrerpolicy=\"strict-origin-when-cross-origin\" allowfullscreen><\/iframe><\/p>\n<p>C\u00e1c b\u1ed9 m\u00f4n gi\u1ea3ng d\u1ea1y t\u1ea1i Teky g\u1ed3m: <span style=\"font-weight: 400;\">L\u1eadp tr\u00ecnh v\u00e0 ph\u00e1t tri\u1ec3n \u1ee9ng d\u1ee5ng<\/span><span style=\"font-weight: 400;\">, <\/span><span style=\"font-weight: 400;\">l\u1eadp tr\u00ecnh game<\/span><span style=\"font-weight: 400;\">, <\/span><span style=\"font-weight: 400;\">l\u1eadp tr\u00ecnh web v\u1edbi python<\/span> <span style=\"font-weight: 400;\">\u00a0<\/span><span style=\"font-weight: 400;\">L\u1eadp tr\u00ecnh Scratch<\/span> <span style=\"font-weight: 400;\">Robotics<\/span> Engineering, C\u00f4ng ngh\u1ec7 3D v\u00e0 MultiMedia. Ch\u00fang t\u00f4i tin r\u1eb1ng tr\u1ebb em Vi\u1ec7t Nam c\u00f3 c\u01a1 h\u1ed9i ph\u00e1t tri\u1ec3n m\u1ea1nh m\u1ebd trong m\u1ed9t n\u1ec1n kinh t\u1ebf s\u1ed1 v\u00e0 c\u1ea7n \u0111\u01b0\u1ee3c trang b\u1ecb s\u1eb5n s\u00e0ng \u0111\u1ec3 tr\u1edf th\u00e0nh nh\u1eefng doanh nh\u00e2n c\u00f4ng ngh\u1ec7 trong t\u01b0\u01a1ng lai.<\/p>\n<h3><span class=\"ez-toc-section\" id=\"Lien_he_ngay_hoc_vien_cong_nghe_sang_tao_TEKY_de_duoc_tu_van_khoa_hoc\"><\/span><span style=\"color: #008000;\"><b>Li\u00ean h\u1ec7 ngay h\u1ecdc vi\u1ec7n c\u00f4ng ngh\u1ec7 s\u00e1ng t\u1ea1o TEKY \u0111\u1ec3 \u0111\u01b0\u1ee3c t\u01b0 v\u1ea5n kh\u00f3a h\u1ecdc:<\/b><\/span><span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Cam k\u00eat 7 tu\u1ed5i c\u00f3 th\u1ec3 l\u1eadp tr\u00ecnh<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Top 10 d\u1ef1 \u00e1n gi\u00e1o d\u1ee5c c\u00f3 t\u1ea7m \u1ea3nh h\u01b0\u1edfng nh\u1ea5t \u0110\u00f4ng Nam \u00c1 2017 &amp; 2018<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">Top 3 D\u1ef1 \u00e1n xu\u1ea5t s\u1eafc nh\u1ea5t, NextGen \u2013 Th\u1ee5y S\u0129<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">\u00a0Hotline H\u00e0 N\u1ed9i: 024-7109-6668 | 0975-241-015<\/span><\/li>\n<li style=\"font-weight: 400;\" aria-level=\"1\"><span style=\"font-weight: 400;\">\u00a0Hotline H\u1ed3 Ch\u00ed Minh: 028-7109 9948 | 097-900-8642<\/span><\/li>\n<\/ul>\n<p><span style=\"font-weight: 400;\">Website <\/span><a href=\"https:\/\/teky.edu.vn\/\"><span style=\"font-weight: 400;\">https:\/\/teky.edu.vn<\/span><\/a><span style=\"font-weight: 400;\"> | Email: support@teky.edu.vn |<\/span><\/p>\n<p><strong>Xem th\u00eam:\u00a0<\/strong><\/p>\n<ul>\n<li><a class=\"LinkSuggestion__Link-sc-1gewdgc-4 evyocv\" href=\"https:\/\/teky.edu.vn\/blog\/sql-la-gi\/\" target=\"_blank\" rel=\"noopener\">SQL l\u00e0 g\u00ec? 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R\u1ea5t nhi\u1ec1u ng\u01b0\u1eddi mu\u1ed1n t\u00ecm hi\u1ec3u th\u00eam c\u00e1c th\u00f4ng tin li\u00ean quan v\u1ec1 SQL, ch\u1eb3ng h\u1ea1n nh\u01b0 SQL l\u00e0 g\u00ec, h\u1ecdc SQL \u0111\u1ec3 l\u00e0m g\u00ec, l\u1eadp tr\u00ecnh SQL nh\u01b0 th\u1ebf n\u00e0o hi\u1ec7u qu\u1ea3 &hellip;<\/p>\n","protected":false},"author":10,"featured_media":7953,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[28],"tags":[],"class_list":["post-7957","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-lap-trinh"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v20.9 (Yoast SEO v26.0) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Ng\u00f4n ng\u1eef SQL l\u00e0 g\u00ec? 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