{"id":3669,"date":"2023-01-11T06:57:29","date_gmt":"2023-01-11T06:57:29","guid":{"rendered":"https:\/\/topviecit.vn\/blog\/?p=3669"},"modified":"2023-01-11T06:58:35","modified_gmt":"2023-01-11T06:58:35","slug":"ngon-ngu-truy-van-sql","status":"publish","type":"post","link":"https:\/\/topviecit.vn\/blog\/ngon-ngu-truy-van-sql\/","title":{"rendered":"Ng\u00f4n ng\u1eef truy v\u1ea5n SQL l\u00e0 g\u00ec? C\u00e1c ki\u1ebfn th\u1ee9c c\u01a1 b\u1ea3n nh\u1ea5t c\u1ea7n bi\u1ebft"},"content":{"rendered":"\n<p><strong><a href=\"https:\/\/topviecit.vn\/blog\/ngon-ngu-truy-van-sql\/\" target=\"_blank\" rel=\"noreferrer noopener\">Ng\u00f4n ng\u1eef truy v\u1ea5n SQL<\/a><\/strong> l\u00e0 m\u1ed9t trong nh\u1eefng ng\u00f4n ng\u1eef l\u1eadp tr\u00ecnh ti\u00eau chu\u1ea9n hi\u1ec7n nay. H\u00e3y c\u00f9ng t\u00ecm hi\u1ec3u v\u1ec1 ng\u00f4n ng\u1eef SQL l\u00e0 g\u00ec v\u00e0 nh\u1eefng ki\u1ebfn th\u1ee9c c\u01a1 b\u1ea3n c\u1ea7n bi\u1ebft ngay trong b\u00e0i vi\u1ebft d\u01b0\u1edbi \u0111\u00e2y c\u1ee7a <a href=\"https:\/\/topviecit.vn\/\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>TopviecIT<\/strong><\/a> nh\u00e9.<\/p>\n\n\n\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_63 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 \" >Table of Contents<\/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 class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/span><\/a><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/topviecit.vn\/blog\/ngon-ngu-truy-van-sql\/#Ngon_ngu_truy_van_SQL_la_gi\" title=\"Ng\u00f4n ng\u1eef truy v\u1ea5n SQL l\u00e0 g\u00ec?\">Ng\u00f4n ng\u1eef truy v\u1ea5n 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:\/\/topviecit.vn\/blog\/ngon-ngu-truy-van-sql\/#Uu_diem_cua_ngon_ngu_truy_van_SQL\" title=\"\u01afu \u0111i\u1ec3m c\u1ee7a ng\u00f4n ng\u1eef truy v\u1ea5n SQL\">\u01afu \u0111i\u1ec3m c\u1ee7a ng\u00f4n ng\u1eef truy v\u1ea5n SQL<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/topviecit.vn\/blog\/ngon-ngu-truy-van-sql\/#Cach_hoat_dong_va_ung_dung_cua_SQL_la_gi\" title=\"C\u00e1ch ho\u1ea1t \u0111\u1ed9ng v\u00e0 \u1ee9ng d\u1ee5ng c\u1ee7a SQL l\u00e0 g\u00ec?\">C\u00e1ch ho\u1ea1t \u0111\u1ed9ng v\u00e0 \u1ee9ng d\u1ee5ng c\u1ee7a SQL l\u00e0 g\u00ec?<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/topviecit.vn\/blog\/ngon-ngu-truy-van-sql\/#Cach_ngon_ngu_SQL_hoat_dong\" title=\"C\u00e1ch ng\u00f4n ng\u1eef SQL ho\u1ea1t \u0111\u1ed9ng\">C\u00e1ch ng\u00f4n ng\u1eef SQL ho\u1ea1t \u0111\u1ed9ng<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/topviecit.vn\/blog\/ngon-ngu-truy-van-sql\/#Ung_dung_cua_ngon_ngu_SQL\" title=\"\u1ee8ng d\u1ee5ng c\u1ee7a ng\u00f4n ng\u1eef SQL\">\u1ee8ng d\u1ee5ng c\u1ee7a ng\u00f4n ng\u1eef SQL<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Ngon_ngu_truy_van_SQL_la_gi\"><\/span><strong>Ng\u00f4n ng\u1eef truy v\u1ea5n SQL l\u00e0 g\u00ec?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>SQL l\u00e0 ng\u00f4n ng\u1eef truy v\u1ea5n c\u00f3 c\u1ea5u tr\u00fac, n\u00f3 \u0111\u1ec1 c\u1eadp \u0111\u1ebfn m\u1ed9t lo\u1ea1i <a href=\"https:\/\/topviecit.vn\/blog\/ngon-ngu-lap-trinh-la-gi\/\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>ng\u00f4n ng\u1eef l\u1eadp tr\u00ecnh<\/strong><\/a> ti\u00eau chu\u1ea9n \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 tr\u00edch xu\u1ea5t, s\u1eafp x\u1ebfp, qu\u1ea3n l\u00fd, thao t\u00e1c d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c l\u01b0u tr\u1eef \u1edf c\u01a1 s\u1edf d\u1eef li\u1ec7u quan h\u1ec7. Hay, SQL c\u00f2n \u0111\u01b0\u1ee3c g\u1ecdi v\u1edbi t\u00ean kh\u00e1c ng\u00f4n ng\u1eef c\u01a1 s\u1edf d\u1eef li\u1ec7u c\u00f3 th\u1ec3 th\u1ef1c thi c\u00e1c ho\u1ea1t \u0111\u1ed9ng, bao g\u1ed3m c\u1ea3 c\u00e1c b\u1ea3ng \u0111\u01b0\u1ee3c t\u1ea1o th\u00e0nh t\u1eeb h\u00e0ng &#8211; c\u1ed9t.<\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"500\" src=\"https:\/\/topviecit.vn\/blog\/wp-content\/uploads\/2023\/01\/ngon-ngu-truy-van-sql-topcv-1.jpg\" alt=\"SQL l\u00e0 ng\u00f4n ng\u1eef truy v\u1ea5n c\u00f3 c\u1ea5u tr\u00fac ti\u00eau chu\u1ea9n\" class=\"wp-image-3671\" srcset=\"https:\/\/topviecit.vn\/blog\/wp-content\/uploads\/2023\/01\/ngon-ngu-truy-van-sql-topcv-1.jpg 800w, https:\/\/topviecit.vn\/blog\/wp-content\/uploads\/2023\/01\/ngon-ngu-truy-van-sql-topcv-1-640x400.jpg 640w, https:\/\/topviecit.vn\/blog\/wp-content\/uploads\/2023\/01\/ngon-ngu-truy-van-sql-topcv-1-768x480.jpg 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><figcaption class=\"wp-element-caption\"><em>SQL l\u00e0 ng\u00f4n ng\u1eef truy v\u1ea5n c\u00f3 c\u1ea5u tr\u00fac ti\u00eau chu\u1ea9n<\/em><\/figcaption><\/figure><\/div>\n\n\n<p>Hi\u1ec7n nay, ng\u00f4n ng\u1eef SQL \u0111ang c\u00f3 vai tr\u00f2 quan tr\u1ecdng trong vi\u1ec7c truy xu\u1ea5t d\u1eef li\u1ec7u li\u00ean quan t\u1eeb c\u01a1 s\u1edf d\u1eef li\u1ec7u. N\u00f3 c\u0169ng c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng tr\u00ean nh\u1eefng n\u1ec1n t\u1ea3ng kh\u00e1c nhau nh\u01b0 Python v\u1edbi m\u1ee5c \u0111\u00edch ph\u00e2n t\u00edch d\u1eef li\u1ec7u. Ngo\u00e0i ra, ng\u00f4n ng\u1eef truy v\u1ea5n SQL c\u0169ng c\u00f3 th\u1ec3 qu\u1ea3n l\u00fd \u0111\u1ed3ng th\u1eddi m\u1ed9t s\u1ed1 giao d\u1ecbch d\u1eef li\u1ec7u khi kh\u1ed1i l\u01b0\u1ee3ng d\u1eef li\u1ec7u l\u1edbn \u0111\u01b0\u1ee3c ghi \u0111\u1ed3ng th\u1eddi.<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Uu_diem_cua_ngon_ngu_truy_van_SQL\"><\/span><strong>\u01afu \u0111i\u1ec3m c\u1ee7a ng\u00f4n ng\u1eef truy v\u1ea5n SQL<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>L\u00e0 m\u1ed9t ng\u00f4n ng\u1eef th\u00e2n thi\u1ec7n v\u1edbi ng\u01b0\u1eddi d\u00f9ng, c\u00f3 th\u1ec3 truy c\u1eadp \u1edf nhi\u1ec1u n\u1ec1n t\u1ea3ng kh\u00e1c nhau, do \u0111\u00f3&nbsp; ng\u00f4n ng\u1eef truy v\u1ea5n SQL s\u1ebd c\u00f3 nh\u1eefng \u01b0u \u0111i\u1ec3m v\u00e0 l\u1ee3i \u00edch nh\u01b0 sau:<\/p>\n\n\n\n<p><strong>L\u00e0 ng\u00f4n ng\u1eef di \u0111\u1ed9ng: <\/strong>SQL l\u00e0 ng\u00f4n ng\u1eef di \u0111\u1ed9ng v\u00e0 b\u1ea1n c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c chuy\u1ec3n t\u1eeb thi\u1ebft b\u1ecb n\u00e0y sang thi\u1ebft b\u1ecb kh\u00e1c. Bao g\u1ed3m c\u1ea3 t\u1eeb laptop qua PC, hay th\u1eadm ch\u00ed c\u1ea3 c\u00e1c thi\u1ebft b\u1ecb di \u0111\u1ed9ng. N\u00f3 c\u00f3 kh\u1ea3 n\u0103ng ch\u1ea1y tr\u00ean h\u1ec7 th\u1ed1ng m\u1ea1ng n\u1ed9i b\u1ed9 t\u1ed1t.<\/p>\n\n\n\n<p><strong>X\u1eed l\u00fd truy v\u1ea5n nhanh: <\/strong>SQL cho kh\u1ea3 n\u0103ng ch\u00e8n, x\u00f3a, truy xu\u1ea5t, thao t\u00e1c d\u1eef li\u1ec7u nhanh ch\u00f3ng, hi\u1ec7u qu\u1ea3 v\u00e0 v\u1eabn \u0111\u1ea3m b\u1ea3o \u0111\u1ed9 ch\u00ednh x\u00e1c c\u1ee7a d\u1eef li\u1ec7u. Do \u0111\u00f3, b\u1ea1n c\u00f3 th\u1ec3 chia s\u1ebb d\u1eef li\u1ec7u nhanh ch\u00f3ng cho nh\u1eefng ng\u01b0\u1eddi d\u00f9ng kh\u00e1c.<\/p>\n\n\n\n<p><strong>Kh\u00f4ng y\u00eau c\u1ea7u v\u1ec1 k\u1ef9 n\u0103ng code: <\/strong>SQL s\u1ebd kh\u00f4ng y\u00eau c\u1ea7u k\u1ef9 n\u0103ng vi\u1ebft code nh\u01b0 c\u00e1c ng\u00f4n ng\u1eef l\u1eadp tr\u00ecnh kh\u00e1c. \u0110\u00e2y l\u00e0 m\u1ed9t \u0111\u1eb7c \u0111i\u1ec3m th\u00e2n thi\u1ec7n v\u1edbi ng\u01b0\u1eddi d\u00f9ng b\u1edfi n\u00f3 gi\u00fap cho m\u1ecdi ng\u01b0\u1eddi d\u00f9ng c\u00f3 th\u1ec3 truy c\u1eadp v\u00e0 qu\u1ea3n l\u00fd d\u1ec5 d\u00e0ng.<\/p>\n\n\n\n<p><strong>N\u1ec1n t\u1ea3ng th\u1ed1ng nh\u1ea5t: <\/strong>Ng\u00f4n ng\u1eef SQL s\u1eed d\u1ee5ng Ti\u1ebfng Anh l\u00e0m chu\u1ea9n. \u0110i\u1ec1u n\u00e0y t\u1ea1o ra s\u1ef1 th\u1ed1ng nh\u1ea5t, d\u1ec5 d\u00e0ng hi\u1ec3u, h\u1ecdc, vi\u1ebft v\u00e0 di\u1ec5n gi\u1ea3i lo\u1ea1i ng\u00f4n ng\u1eef n\u00e0y.<\/p>\n\n\n\n<p><strong>Cung c\u1ea5p nhi\u1ec1u d\u1ea1ng xem d\u1eef li\u1ec7u: <\/strong>Gi\u00fap ng\u01b0\u1eddi d\u00f9ng kh\u00e1c nhau c\u00f3 th\u1ec3 tr\u1ef1c quan h\u00f3a c\u1ea5u tr\u00fac c\u01a1 s\u1edf d\u1eef li\u1ec7u v\u00e0 n\u1ed9i dung c\u1ee7a n\u00f3 theo c\u00e1ch kh\u00e1c nhau.<\/p>\n\n\n\n<p><strong>M\u1ed9t s\u1ed1 l\u1ee3i \u00edch v\u00e0 \u01b0u \u0111i\u1ec3m kh\u00e1c: <\/strong>C\u00f3 m\u00e3 ngu\u1ed3n m\u1edf (v\u00ed d\u1ee5 nh\u01b0 MySQL, MariaDB v\u00e0 PostGresSQL), \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng b\u1edfi nhi\u1ec1u nh\u00e0 cung c\u1ea5p h\u1ec7 th\u1ed1ng qu\u1ea3n l\u00fd c\u01a1 s\u1edf d\u1eef li\u1ec7u h\u00e0ng \u0111\u1ea7u, ng\u00f4n ng\u1eef t\u01b0\u01a1ng t\u00e1c v\u00e0 di\u1ec5n gi\u1ea3i n\u00ean gi\u1ea3m kh\u1ea3 n\u0103ng giao ti\u1ebfp sai,..<\/p>\n\n\n\n<p>Xem th\u00eam: <strong><a href=\"https:\/\/topviecit.vn\/blog\/ngon-ngu-may-tinh-la-gi\/\" target=\"_blank\" rel=\"noreferrer noopener\">Ng\u00f4n Ng\u1eef M\u00e1y T\u00ednh L\u00e0 G\u00ec? \u1ee8ng D\u1ee5ng Nh\u01b0 Th\u1ebf N\u00e0o?<\/a><\/strong><\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"500\" src=\"https:\/\/topviecit.vn\/blog\/wp-content\/uploads\/2023\/01\/ngon-ngu-truy-van-sql-topcv-2.jpg\" alt=\"Ng\u00f4n ng\u1eef truy v\u1ea5n SQL c\u00f3 mang \u0111\u1ebfn nhi\u1ec1u l\u1ee3i \u00edch khi s\u1eed d\u1ee5ng\" class=\"wp-image-3672\" srcset=\"https:\/\/topviecit.vn\/blog\/wp-content\/uploads\/2023\/01\/ngon-ngu-truy-van-sql-topcv-2.jpg 800w, https:\/\/topviecit.vn\/blog\/wp-content\/uploads\/2023\/01\/ngon-ngu-truy-van-sql-topcv-2-640x400.jpg 640w, https:\/\/topviecit.vn\/blog\/wp-content\/uploads\/2023\/01\/ngon-ngu-truy-van-sql-topcv-2-768x480.jpg 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><figcaption class=\"wp-element-caption\"><em>Ng\u00f4n ng\u1eef truy v\u1ea5n SQL c\u00f3 mang \u0111\u1ebfn nhi\u1ec1u l\u1ee3i \u00edch khi s\u1eed d\u1ee5ng<\/em><\/figcaption><\/figure><\/div>\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Cach_hoat_dong_va_ung_dung_cua_SQL_la_gi\"><\/span><strong>C\u00e1ch ho\u1ea1t \u0111\u1ed9ng v\u00e0 \u1ee9ng d\u1ee5ng c\u1ee7a SQL l\u00e0 g\u00ec?<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>Hi\u1ec3u v\u1ec1 c\u00e1ch ng\u00f4n ng\u1eef truy v\u1ea5n SQL ho\u1ea1t \u0111\u1ed9ng, b\u1ea1n s\u1ebd bi\u1ebft v\u00ec sao n\u00f3 \u0111\u01b0\u1ee3c \u1ee9ng d\u1ee5ng v\u00e0o nh\u1eefng l\u0129nh v\u1ef1c kh\u00e1c. C\u1ee5 th\u1ec3 nh\u01b0 sau:<\/p>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Cach_ngon_ngu_SQL_hoat_dong\"><\/span><strong>C\u00e1ch ng\u00f4n ng\u1eef SQL ho\u1ea1t \u0111\u1ed9ng<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Khi ng\u00f4n ng\u1eef SQL \u0111\u01b0\u1ee3c vi\u1ebft v\u00e0 b\u1eaft \u0111\u1ea7u ch\u1ea1y, n\u00f3 s\u1ebd \u0111\u01b0\u1ee3c x\u1eed l\u00fd b\u1edfi b\u1ed9 x\u1eed l\u00fd ng\u00f4n ng\u1eef truy v\u1ea5n. B\u1ed9 x\u1eed l\u00fd n\u00e0y c\u00f3 nh\u1eefng tr\u00ecnh ph\u00e2n t\u00edch c\u00fa ph\u00e1p, tr\u00ecnh t\u1ed1i \u01b0u h\u00f3a truy v\u1ea5n. Sau \u0111\u00f3, m\u00e1y ch\u1ee7 SQL s\u1ebd th\u1ef1c hi\u1ec7n bi\u00ean d\u1ecbch truy v\u1ea5n, x\u1eed l\u00fd theo 3 giai \u0111o\u1ea1n sau:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Ph\u00e2n t\u00edch c\u00fa ph\u00e1p: \u0110\u1ec1 c\u1eadp \u0111\u1ebfn qu\u00e1 tr\u00ecnh ki\u1ec3m tra ch\u00e9o c\u00fa ph\u00e1p c\u1ee7a truy v\u1ea5n.<\/li>\n\n\n\n<li>R\u00e0ng bu\u1ed9c: B\u01b0\u1edbc n\u00e0y th\u1ef1c hi\u1ec7n x\u00e1c minh ng\u1eef ngh\u0129a truy v\u1ea5n tr\u01b0\u1edbc khi th\u1ef1c hi\u1ec7n.<\/li>\n\n\n\n<li>T\u1ed1i \u01b0u h\u00f3a: \u0110\u00e2y l\u00e0 b\u01b0\u1edbc cu\u1ed1i c\u00f9ng v\u00e0 th\u1ef1c hi\u1ec7n m\u1ee5c ti\u00eau li\u00ean quan \u0111\u1ebfn x\u00e1c \u0111\u1ecbnh k\u1ebf ho\u1ea1ch th\u1ef1c hi\u1ec7n truy v\u1ea5n hi\u1ec7u qu\u1ea3 ch\u1ea1y trong th\u1eddi gian t\u1ed1i thi\u1ec3u. \u0110i\u1ec1u n\u00e0y c\u00f3 ngh\u0129a l\u00e0 th\u1eddi gian ph\u1ea3n h\u1ed3i truy v\u1ea5n SQL c\u00e0ng ng\u1eafn, k\u1ebft qu\u1ea3 c\u00e0ng t\u1ed1t.<\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"Ung_dung_cua_ngon_ngu_SQL\"><\/span><strong>\u1ee8ng d\u1ee5ng c\u1ee7a ng\u00f4n ng\u1eef SQL<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h3>\n\n\n\n<p>Hi\u1ec7n t\u1ea1i, ng\u00f4n ng\u1eef truy v\u1ea5n SQL \u0111ang \u0111\u01b0\u1ee3c \u1ee9ng d\u1ee5ng v\u00e0o c\u00e1c v\u1ea5n \u0111\u1ec1 ch\u00ednh nh\u01b0 sau:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Qu\u1ea3n l\u00fd c\u01a1 s\u1edf d\u1eef li\u1ec7u: Vi\u1ec7c s\u1eed d\u1ee5ng SQL l\u00e0 r\u1ea5t c\u01a1 b\u1ea3n \u0111\u1ec3 duy tr\u00ec d\u1eef li\u1ec7u trong <a href=\"https:\/\/topviecit.vn\/blog\/he-quan-tri-co-so-du-lieu-la-gi\/\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>h\u1ec7 qu\u1ea3n tr\u1ecb c\u01a1 s\u1edf d\u1eef li\u1ec7u<\/strong><\/a> (RDBMS) v\u00e0 th\u1ef1c hi\u1ec7n c\u00e1c thao t\u00e1c tr\u00ean h\u1ec7 th\u1ed1ng n\u00e0y.<\/li>\n\n\n\n<li>Th\u1ef1c hi\u1ec7n c\u00e1c thao t\u00e1c c\u01a1 s\u1edf d\u1eef li\u1ec7u c\u01a1 b\u1ea3n: V\u00ed d\u1ee5 nh\u01b0 truy xu\u1ea5t d\u1eef li\u1ec7u t\u1eeb x\u01a1 s\u1edf, th\u1ef1c hi\u1ec7n nh\u1eefng thao t\u00e1c quan tr\u1ecdng nh\u01b0 ch\u00e8n, c\u1eadp nh\u1eadt, x\u00f3a,&#8230; SQL c\u0169ng \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng c\u1ea5p quy\u1ec1n cho ng\u01b0\u1eddi d\u00f9ng, quy\u1ec1n truy c\u1eadp \u0111\u1ec3 th\u1ef1c hi\u1ec7n m\u1ed9t s\u1ed1 thao t\u00e1c n\u00e0o \u0111\u00f3.<\/li>\n\n\n\n<li>Cho ph\u00e9p ki\u1ec3m so\u00e1t giao d\u1ecbch c\u01a1 s\u1edf d\u1eef li\u1ec7u: SQL \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 duy tr\u00ec t\u00ednh nh\u1ea5t qu\u00e1n trong c\u00e1c giao d\u1ecbch c\u01a1 s\u1edf d\u1eef li\u1ec7u theo nguy\u00ean t\u1eafc ACID c\u01a1 b\u1ea3n. Nguy\u00ean t\u1eafc n\u00e0y \u0111\u1ec1 c\u1eadp \u0111\u1ebfn t\u00ednh nh\u1ea5t qu\u00e1n, t\u00ednh nguy\u00ean t\u1eed, s\u1ef1 c\u00f4 l\u1eadp, \u0111\u1ed9 b\u1ec1n.<\/li>\n\n\n\n<li>S\u1eed d\u1ee5ng trong th\u1ef1c thi l\u1ec7nh JOIN v\u00e0 SQL UNION: \u0110\u1ec3 h\u1ee3p nh\u1ea5t hai b\u1ea3ng trong <a href=\"https:\/\/topviecit.vn\/blog\/co-so-du-lieu-la-gi\/\" target=\"_blank\" rel=\"noreferrer noopener\"><strong>c\u01a1 s\u1edf d\u1eef li\u1ec7u<\/strong><\/a> nh\u1eb1m cung c\u1ea5p m\u1ed9t k\u1ebft qu\u1ea3 ho\u1eb7c \u0111\u1ea7u ra duy nh\u1ea5t.<\/li>\n<\/ul>\n\n\n\n<p>Xem th\u00eam: <strong><a href=\"https:\/\/topviecit.vn\/blog\/lap-trinh-react-native-la-gi\/\" target=\"_blank\" rel=\"noreferrer noopener\">L\u1eadp tr\u00ecnh React Native l\u00e0 g\u00ec? M\u1ee9c l\u01b0\u01a1ng React Native l\u00e0 bao nhi\u00eau?<\/a><\/strong><\/p>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"800\" height=\"500\" src=\"https:\/\/topviecit.vn\/blog\/wp-content\/uploads\/2023\/01\/ngon-ngu-truy-van-sql-topcv-3.jpg\" alt=\"SQL \u0111\u01b0\u1ee3c \u1ee9ng d\u1ee5ng ph\u1ed5 bi\u1ebfn trong qu\u1ea3n l\u00fd c\u01a1 s\u1edf d\u1eef li\u1ec7u\" class=\"wp-image-3673\" srcset=\"https:\/\/topviecit.vn\/blog\/wp-content\/uploads\/2023\/01\/ngon-ngu-truy-van-sql-topcv-3.jpg 800w, https:\/\/topviecit.vn\/blog\/wp-content\/uploads\/2023\/01\/ngon-ngu-truy-van-sql-topcv-3-640x400.jpg 640w, https:\/\/topviecit.vn\/blog\/wp-content\/uploads\/2023\/01\/ngon-ngu-truy-van-sql-topcv-3-768x480.jpg 768w\" sizes=\"auto, (max-width: 800px) 100vw, 800px\" \/><figcaption class=\"wp-element-caption\"><em>SQL \u0111\u01b0\u1ee3c \u1ee9ng d\u1ee5ng ph\u1ed5 bi\u1ebfn trong qu\u1ea3n l\u00fd c\u01a1 s\u1edf d\u1eef li\u1ec7u<\/em><\/figcaption><\/figure><\/div>\n\n\n<p>Hy v\u1ecdng v\u1edbi nh\u1eefng <strong><a href=\"https:\/\/topviecit.vn\/blog\/chuyen-muc\/chia-se-kinh-nghiem\/\" target=\"_blank\" rel=\"noreferrer noopener\">chia s\u1ebb kinh nghi\u1ec7m<\/a><\/strong> \u1edf tr\u00ean, b\u1ea1n s\u1ebd hi\u1ec3u h\u01a1n v\u1ec1 <strong>ng\u00f4n ng\u1eef truy v\u1ea5n SQL l\u00e0 g\u00ec<\/strong> v\u00e0 nh\u1eefng ki\u1ebfn th\u1ee9c c\u01a1 b\u1ea3n li\u00ean quan. Ngo\u00e0i ra, b\u1ea1n c\u0169ng c\u00f3 th\u1ec3 truy c\u1eadp v\u00e0o <a href=\"https:\/\/www.topcv.vn\/\" target=\"_blank\" rel=\"noreferrer noopener\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-cyan-blue-color\">TopCV<\/mark><\/strong><\/a> n\u1ebfu \u0111ang quan t\u00e2m \u0111\u1ebfn nh\u1eefng c\u01a1 h\u1ed9i <strong><a href=\"https:\/\/www.topcv.vn\/tim-viec-lam-lap-trinh-vien\" target=\"_blank\" rel=\"noreferrer noopener\"><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-cyan-blue-color\">vi\u1ec7c l\u00e0m l\u1eadp tr\u00ecnh vi\u00ean<\/mark><\/a><\/strong> \u0111\u1ec3 ti\u1ebfp c\u1eadn v\u1edbi nhi\u1ec1u tin tuy\u1ec3n d\u1ee5ng h\u1ea5p d\u1eabn h\u01a1n nh\u00e9.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Ng\u00f4n ng\u1eef truy v\u1ea5n SQL l\u00e0 m\u1ed9t trong nh\u1eefng ng\u00f4n ng\u1eef l\u1eadp tr\u00ecnh ti\u00eau chu\u1ea9n hi\u1ec7n nay. H\u00e3y c\u00f9ng t\u00ecm hi\u1ec3u v\u1ec1 ng\u00f4n ng\u1eef SQL l\u00e0 g\u00ec v\u00e0 nh\u1eefng ki\u1ebfn th\u1ee9c c\u01a1 b\u1ea3n c\u1ea7n bi\u1ebft ngay trong b\u00e0i vi\u1ebft d\u01b0\u1edbi \u0111\u00e2y c\u1ee7a TopviecIT nh\u00e9. Ng\u00f4n ng\u1eef truy v\u1ea5n SQL l\u00e0 g\u00ec? SQL l\u00e0 ng\u00f4n ng\u1eef [&hellip;]<\/p>\n","protected":false},"author":6,"featured_media":3670,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"cybocfi_hide_featured_image":"","footnotes":""},"categories":[86],"tags":[1018,1020,1015,1017,1019,1014,1016,1021],"class_list":["post-3669","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-chia-se-kinh-nghiem","tag-ngon-ngu-sql","tag-ngon-ngu-sql-co-ban","tag-ngon-ngu-sql-la-gi","tag-ngon-ngu-sql-server","tag-ngon-ngu-truy-van-du-lieu","tag-ngon-ngu-truy-van-sql","tag-sql-la-gi","tag-truy-van-sql"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v24.5 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Ng\u00f4n ng\u1eef truy v\u1ea5n SQL l\u00e0 g\u00ec? C\u00e1c ki\u1ebfn th\u1ee9c c\u01a1 b\u1ea3n nh\u1ea5t c\u1ea7n bi\u1ebft<\/title>\n<meta name=\"description\" content=\"Ng\u00f4n ng\u1eef truy v\u1ea5n SQL l\u00e0 m\u1ed9t trong nh\u1eefng ng\u00f4n ng\u1eef l\u1eadp tr\u00ecnh ti\u00eau chu\u1ea9n hi\u1ec7n nay. H\u00e3y c\u00f9ng t\u00ecm hi\u1ec3u v\u1ec1 ng\u00f4n ng\u1eef SQL l\u00e0 g\u00ec nh\u00e9.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/topviecit.vn\/blog\/ngon-ngu-truy-van-sql\/\" \/>\n<meta property=\"og:locale\" content=\"vi_VN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Ng\u00f4n ng\u1eef truy v\u1ea5n SQL l\u00e0 g\u00ec? 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