MySQL l\u00e0 m\u1ed9t h\u1ec7 th\u1ed1ng qu\u1ea3n l\u00fd c\u01a1 s\u1edf d\u1eef li\u1ec7u m\u00e3 ngu\u1ed3n m\u1edf (open-source database management system) \u0111\u01b0\u1ee3c ph\u00e1t tri\u1ec3n b\u1edfi t\u1eadp \u0111o\u00e0n Oracle Corporation. MySQL \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng ph\u1ed5 bi\u1ebfn trong c\u00e1c \u1ee9ng d\u1ee5ng web, \u0111\u1eb7c bi\u1ec7t l\u00e0 c\u00e1c trang web c\u00f3 l\u01b0\u1ee3ng truy c\u1eadp l\u1edbn nh\u01b0 Facebook, Twitter v\u00e0 YouTube. N\u00f3 cung c\u1ea5p c\u00e1c t\u00ednh n\u0103ng m\u1ea1nh m\u1ebd \u0111\u1ec3 qu\u1ea3n l\u00fd v\u00e0 l\u01b0u tr\u1eef d\u1eef li\u1ec7u quan h\u1ec7.<\/p>\n
MySQL l\u00e0 m\u1ed9t h\u1ec7 th\u1ed1ng qu\u1ea3n l\u00fd c\u01a1 s\u1edf d\u1eef li\u1ec7u quan h\u1ec7, trong \u0111\u00f3 d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c t\u1ed5 ch\u1ee9c v\u00e0 l\u01b0u tr\u1eef d\u01b0\u1edbi d\u1ea1ng c\u00e1c b\u1ea3ng v\u00e0 c\u00e1c b\u1ea3ng n\u00e0y \u0111\u01b0\u1ee3c li\u00ean k\u1ebft v\u1edbi nhau th\u00f4ng qua kh\u00f3a ngo\u1ea1i. V\u00ed d\u1ee5, trong m\u1ed9t c\u01a1 s\u1edf d\u1eef li\u1ec7u MySQL v\u1ec1 h\u1ec7 th\u1ed1ng \u0111\u0103ng k\u00fd h\u1ecdc t\u1eadp, c\u00f3 th\u1ec3 c\u00f3 b\u1ea3ng Sinh vi\u00ean, b\u1ea3ng M\u00f4n h\u1ecdc v\u00e0 b\u1ea3ng \u0110\u0103ng k\u00fd h\u1ecdc ph\u1ea7n. B\u1ea3ng Sinh vi\u00ean v\u00e0 b\u1ea3ng M\u00f4n h\u1ecdc s\u1ebd \u0111\u01b0\u1ee3c li\u00ean k\u1ebft v\u1edbi nhau th\u00f4ng qua kh\u00f3a ngo\u1ea1i M\u00e3 sinh vi\u00ean. Khi mu\u1ed1n t\u00ecm t\u1ea5t c\u1ea3 c\u00e1c m\u00f4n h\u1ecdc m\u00e0 m\u1ed9t sinh vi\u00ean \u0111\u00e3 \u0111\u0103ng k\u00fd, ch\u00fang ta c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng c\u00e2u truy v\u1ea5n SQL nh\u01b0 sau:<\/p>\n
SELECT M\u00f4n_h\u1ecdc.* FROM M\u00f4n_h\u1ecdc \r\nINNER JOIN \u0110\u0103ng_k\u00fd_h\u1ecdc_ph\u1ea7n \r\nON M\u00f4n_h\u1ecdc.M\u00e3_m\u00f4n_h\u1ecdc = \u0110\u0103ng_k\u00fd_h\u1ecdc_ph\u1ea7n.M\u00e3_m\u00f4n_h\u1ecdc \r\nWHERE \u0110\u0103ng_k\u00fd_h\u1ecdc_ph\u1ea7n.M\u00e3_sinh_vi\u00ean = 'SV001';\r\n\r\n<\/pre>\nMySQL cung c\u1ea5p c\u00e1c t\u00ednh n\u0103ng nh\u01b0 \u0111a ng\u01b0\u1eddi d\u00f9ng, ph\u00e2n quy\u1ec1n, b\u1ea3o m\u1eadt v\u00e0 kh\u1ea3 n\u0103ng nh\u00e2n r\u1ed9ng \u0111\u1ec3 x\u1eed l\u00fd c\u00e1c \u1ee9ng d\u1ee5ng c\u00f3 l\u01b0\u1ee3ng truy c\u1eadp l\u1edbn. N\u00f3 h\u1ed7 tr\u1ee3 c\u00e1c c\u00e2u l\u1ec7nh SQL \u0111\u1ec3 t\u1ea1o v\u00e0 qu\u1ea3n l\u00fd c\u01a1 s\u1edf d\u1eef li\u1ec7u, bao g\u1ed3m c\u00e1c c\u00e2u l\u1ec7nh SELECT, INSERT, UPDATE v\u00e0 DELETE.<\/p>\n
MySQL c\u0169ng c\u00f3 kh\u1ea3 n\u0103ng m\u1edf r\u1ed9ng, cho ph\u00e9p c\u00e1c node m\u1edbi \u0111\u01b0\u1ee3c th\u00eam v\u00e0o \u0111\u1ec3 t\u0103ng kh\u1ea3 n\u0103ng x\u1eed l\u00fd d\u1eef li\u1ec7u. N\u00f3 h\u1ed7 tr\u1ee3 c\u00e1c t\u00ednh n\u0103ng nh\u01b0 sao l\u01b0u d\u1eef li\u1ec7u, ph\u1ee5c h\u1ed3i d\u1eef li\u1ec7u v\u00e0 t\u1ed1i \u01b0u h\u00f3a c\u01a1 s\u1edf d\u1eef li\u1ec7u \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o hi\u1ec7u su\u1ea5t v\u00e0 \u0111\u1ed9 tin c\u1eady c\u1ee7a h\u1ec7 th\u1ed1ng.<\/p>\n
T\u00f3m l\u1ea1i, MySQL l\u00e0 m\u1ed9t h\u1ec7 th\u1ed1ng qu\u1ea3n l\u00fd c\u01a1 s\u1edf d\u1eef li\u1ec7u r\u1ea5t m\u1ea1nh m\u1ebd v\u00e0 ph\u1ed5 bi\u1ebfn. N\u00f3 cung c\u1ea5p c\u00e1c t\u00ednh n\u0103ng \u0111\u1ec3 qu\u1ea3n l\u00fd v\u00e0 l\u01b0u tr\u1eef d\u1eef li\u1ec7u quan h\u1ec7, v\u00e0 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i trong c\u00e1c \u1ee9ng d\u1ee5ng doanh nghi\u1ec7p v\u00e0 c\u00e1c trang web l\u1edbn tr\u00ean to\u00e0n
\nth\u1ebf gi\u1edbi. Ngo\u00e0i ra, MySQL c\u00f2n \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i trong c\u00e1c \u1ee9ng d\u1ee5ng web v\u00e0 mobile nh\u1ecf h\u01a1n, c\u1ea3 trong c\u00e1c d\u1ef1 \u00e1n c\u00e1 nh\u00e2n v\u00e0 th\u01b0\u01a1ng m\u1ea1i.<\/p>\nM\u1ed9t s\u1ed1 l\u1ee3i \u00edch c\u1ee7a MySQL bao g\u1ed3m:<\/p>\n
Hi\u1ec7u su\u1ea5t cao: MySQL l\u00e0 m\u1ed9t h\u1ec7 th\u1ed1ng qu\u1ea3n l\u00fd c\u01a1 s\u1edf d\u1eef li\u1ec7u c\u00f3 hi\u1ec7u su\u1ea5t r\u1ea5t cao. N\u00f3 cho ph\u00e9p x\u1eed l\u00fd d\u1eef li\u1ec7u nhanh ch\u00f3ng v\u00e0 c\u00f3 th\u1ec3 x\u1eed l\u00fd h\u00e0ng tr\u0103m ngh\u00ecn truy v\u1ea5n m\u1ed7i gi\u00e2y.
\nKh\u1ea3 n\u0103ng m\u1edf r\u1ed9ng: MySQL c\u00f3 th\u1ec3 m\u1edf r\u1ed9ng d\u1ecdc theo c\u00e1c h\u00e0ng c\u1ee7a b\u1ea3ng v\u00e0 m\u1edf r\u1ed9ng ngang b\u1eb1ng c\u00e1ch th\u00eam nhi\u1ec1u node v\u00e0o h\u1ec7 th\u1ed1ng \u0111\u1ec3 t\u0103ng kh\u1ea3 n\u0103ng x\u1eed l\u00fd d\u1eef li\u1ec7u.
\n\u0110\u1ed9 tin c\u1eady: MySQL cung c\u1ea5p c\u00e1c t\u00ednh n\u0103ng nh\u01b0 sao l\u01b0u d\u1eef li\u1ec7u v\u00e0 ph\u1ee5c h\u1ed3i d\u1eef li\u1ec7u \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o r\u1eb1ng d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c b\u1ea3o v\u1ec7 v\u00e0 c\u00f3 th\u1ec3 kh\u00f4i ph\u1ee5c \u0111\u01b0\u1ee3c trong tr\u01b0\u1eddng h\u1ee3p c\u00f3 s\u1ef1 c\u1ed1.
\nD\u1ec5 s\u1eed d\u1ee5ng: MySQL c\u00f3 m\u1ed9t giao di\u1ec7n ng\u01b0\u1eddi d\u00f9ng \u0111\u01a1n gi\u1ea3n v\u00e0 d\u1ec5 s\u1eed d\u1ee5ng, cho ph\u00e9p c\u00e1c nh\u00e0 ph\u00e1t tri\u1ec3n nhanh ch\u00f3ng t\u1ea1o v\u00e0 qu\u1ea3n l\u00fd c\u01a1 s\u1edf d\u1eef li\u1ec7u c\u1ee7a m\u00ecnh.
\nH\u1ed7 tr\u1ee3 \u0111a n\u1ec1n t\u1ea3ng: MySQL c\u00f3 th\u1ec3 ho\u1ea1t \u0111\u1ed9ng tr\u00ean nhi\u1ec1u n\u1ec1n t\u1ea3ng kh\u00e1c nhau nh\u01b0 Windows, Linux v\u00e0 macOS.
\nTuy nhi\u00ean, nh\u01b0 m\u1ecdi h\u1ec7 th\u1ed1ng, MySQL c\u0169ng c\u00f3 nh\u1eefng h\u1ea1n ch\u1ebf v\u00e0 \u0111i\u1ec3m y\u1ebfu. M\u1ed9t trong nh\u1eefng \u0111i\u1ec3m y\u1ebfu c\u1ee7a MySQL l\u00e0 kh\u00f4ng c\u00f3 t\u00ednh n\u0103ng t\u01b0\u01a1ng th\u00edch v\u1edbi c\u00e1c d\u1ea1ng d\u1eef li\u1ec7u phi quan h\u1ec7. N\u1ebfu \u1ee9ng d\u1ee5ng c\u1ee7a b\u1ea1n \u0111\u00f2i h\u1ecfi l\u01b0u tr\u1eef c\u00e1c lo\u1ea1i d\u1eef li\u1ec7u phi quan h\u1ec7, b\u1ea1n c\u00f3 th\u1ec3 c\u00e2n nh\u1eafc s\u1eed d\u1ee5ng c\u00e1c h\u1ec7 th\u1ed1ng NoSQL nh\u01b0 MongoDB.<\/p>\nT\u00f3m l\u1ea1i, MySQL l\u00e0 m\u1ed9t h\u1ec7 th\u1ed1ng qu\u1ea3n l\u00fd c\u01a1 s\u1edf d\u1eef li\u1ec7u m\u1ea1nh m\u1ebd v\u00e0 ph\u1ed5 bi\u1ebfn \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng r\u1ed9ng r\u00e3i trong c\u00e1c \u1ee9ng d\u1ee5ng web v\u00e0 mobile. N\u00f3 cung c\u1ea5p c\u00e1c t\u00ednh n\u0103ng \u0111\u1ec3 qu\u1ea3n l\u00fd v\u00e0 l\u01b0u tr\u1eef d\u1eef li\u1ec7u quan h\u1ec7, v\u00e0 \u0111\u01b0\u1ee3c \u0111\u00e1nh gi\u00e1 cao v\u1ec1 hi\u1ec7u su\u1ea5t, \u0111\u1ed9 tin c\u1eady v\u00e0 kh\u1ea3 n\u0103ng m\u1edf r\u1ed9ng.<\/p>\n","protected":false},"excerpt":{"rendered":"
MySQL l\u00e0 m\u1ed9t h\u1ec7 th\u1ed1ng qu\u1ea3n l\u00fd c\u01a1 s\u1edf d\u1eef li\u1ec7u m\u00e3 ngu\u1ed3n m\u1edf (open-source database management system) \u0111\u01b0\u1ee3c ph\u00e1t tri\u1ec3n b\u1edfi t\u1eadp \u0111o\u00e0n Oracle Corporation. MySQL \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng ph\u1ed5 bi\u1ebfn trong c\u00e1c \u1ee9ng d\u1ee5ng web, \u0111\u1eb7c bi\u1ec7t l\u00e0 c\u00e1c trang web c\u00f3 l\u01b0\u1ee3ng truy c\u1eadp l\u1edbn nh\u01b0 Facebook, Twitter v\u00e0 YouTube. N\u00f3 cung […]<\/p>\n","protected":false},"author":1,"featured_media":395,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"amp_status":"","footnotes":""},"categories":[36,37],"tags":[],"class_list":{"0":"post-394","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-database","8":"category-mysql"},"_links":{"self":[{"href":"https:\/\/thietkewebdalat.net\/blog\/wp-json\/wp\/v2\/posts\/394","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/thietkewebdalat.net\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/thietkewebdalat.net\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/thietkewebdalat.net\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/thietkewebdalat.net\/blog\/wp-json\/wp\/v2\/comments?post=394"}],"version-history":[{"count":1,"href":"https:\/\/thietkewebdalat.net\/blog\/wp-json\/wp\/v2\/posts\/394\/revisions"}],"predecessor-version":[{"id":396,"href":"https:\/\/thietkewebdalat.net\/blog\/wp-json\/wp\/v2\/posts\/394\/revisions\/396"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/thietkewebdalat.net\/blog\/wp-json\/wp\/v2\/media\/395"}],"wp:attachment":[{"href":"https:\/\/thietkewebdalat.net\/blog\/wp-json\/wp\/v2\/media?parent=394"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/thietkewebdalat.net\/blog\/wp-json\/wp\/v2\/categories?post=394"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/thietkewebdalat.net\/blog\/wp-json\/wp\/v2\/tags?post=394"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}