{"id":3629,"date":"2021-10-29T20:33:11","date_gmt":"2021-10-29T13:33:11","guid":{"rendered":"https:\/\/www.vietlearn.org\/post\/?p=3629"},"modified":"2021-10-29T20:33:13","modified_gmt":"2021-10-29T13:33:13","slug":"database-khai-niem-co-so-du-lieu-la-gi-cac-hop-phan-cua-csdl","status":"publish","type":"post","link":"https:\/\/www.vietlearn.org\/kien-thuc\/database-khai-niem-co-so-du-lieu-la-gi-cac-hop-phan-cua-csdl\/","title":{"rendered":"[Database] \u2013 Kh\u00e1i ni\u1ec7m c\u01a1 s\u1edf d\u1eef li\u1ec7u l\u00e0 g\u00ec, c\u00e1c h\u1ee3p ph\u1ea7n c\u1ee7a CSDL"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Ghi ch\u00fa: T\u00e0i li\u1ec7u tr\u00edch d\u1eabn<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">V\u1edbi nh\u1eefng ai <a href=\"https:\/\/www.vietlearn.org\" data-internallinksmanager029f6b8e52c=\"2\" title=\"Vietlearn\" rel=\"nofollow\">h\u1ecdc t\u1eadp<\/a>, l\u00e0m vi\u1ec7c trong l\u0129nh v\u1ef1c c\u00f4ng ngh\u1ec7 th\u00f4ng tin ch\u1eafc ch\u1eafn s\u1ebd kh\u00f4ng c\u00f2n xa l\u1ea1 v\u1edbi thu\u1eadt ng\u1eef c\u01a1 s\u1edf d\u1eef li\u1ec7u. Tuy nhi\u00ean kh\u00f4ng ph\u1ea3i ai c\u0169ng c\u00f3 th\u1ec3 gi\u1ea3i th\u00edch \u0111\u01b0\u1ee3c \u0111\u1ea7y \u0111\u1ee7 kh\u00e1i ni\u1ec7m c\u01a1 s\u1edf d\u1eef li\u1ec7u l\u00e0 g\u00ec, c\u00e1c th\u00e0nh ph\u1ea7n c\u01a1 b\u1ea3n c\u1ee7a ch\u00fang nh\u01b0 th\u1ebf n\u00e0o? T\u1ea5t c\u1ea3 s\u1ebd \u0111\u01b0\u1ee3c ch\u00fang t\u00f4i gi\u1ea3i \u0111\u00e1p chi ti\u1ebft trong n\u1ed9i dung b\u00e0i vi\u1ebft d\u01b0\u1edbi \u0111\u00e2y.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C\u01a1 s\u1edf d\u1eef li\u1ec7u l\u00e0 g\u00ec? C\u00e1c thu\u1eadt ng\u1eef li\u00ean quan<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">D\u1eef li\u1ec7u l\u00e0 g\u00ec?<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Tr\u01b0\u1edbc khi t\u00ecm hi\u1ec3u kh\u00e1i ni\u1ec7m c\u01a1 s\u1edf d\u1eef li\u1ec7u l\u00e0 g\u00ec th\u00ec b\u1ea1n c\u0169ng c\u1ea7n ph\u1ea3i hi\u1ec3u \u0111\u01b0\u1ee3c kh\u00e1i ni\u1ec7m d\u1eef li\u1ec7u l\u00e0 g\u00ec. D\u1eef li\u1ec7u l\u00e0 nh\u1eefng th\u00f4ng tin d\u01b0\u1edbi d\u1ea1ng k\u00ed hi\u1ec7u ch\u1eef vi\u1ebft, s\u1ed1, h\u00ecnh \u1ea3nh, \u00e2m thanh ho\u1eb7c c\u00e1c d\u1ea1ng t\u01b0\u01a1ng t\u1ef1.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C\u01a1 s\u1edf d\u1eef li\u1ec7u l\u00e0 g\u00ec? Database l\u00e0 g\u00ec?<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C\u01a1 s\u1edf d\u1eef li\u1ec7u c\u00f3 t\u00ean ti\u1ebfng anh l\u00e0 Database, vi\u1ebft t\u1eaft l\u00e0 CSDL. L\u00e0 m\u1ed9t t\u1eadp h\u1ee3p c\u00e1c d\u1eef li\u1ec7u c\u00f3 t\u1ed5 ch\u1ee9c, \u0111\u01b0\u1ee3c l\u01b0u tr\u1eef v\u00e0 truy c\u1eadp \u0111i\u1ec7n t\u1eed t\u1eeb h\u1ec7 th\u1ed1ng m\u00e1y t\u00ednh. Khi c\u01a1 s\u1edf d\u1eef li\u1ec7u ph\u1ee9c t\u1ea1p h\u01a1n, ch\u00fang s\u1ebd \u0111\u01b0\u1ee3c ph\u00e1t tri\u1ec3n b\u1eb1ng c\u00e1ch s\u1eed d\u1ee5ng c\u00e1c <a href=\"https:\/\/www.vietlearn.org\" data-internallinksmanager029f6b8e52c=\"2\" title=\"Vietlearn\" rel=\"nofollow\">thi\u1ebft k\u1ebf<\/a> v\u00e0 m\u00f4 h\u00ecnh h\u00f3a h\u00ecnh th\u1ee9c.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Kh\u00e1i ni\u1ec7m CSDL l\u00e0 g\u00ec c\u00f2n \u0111\u01b0\u1ee3c \u0111\u1ecbnh ngh\u0129a l\u00e0 m\u1ed9t t\u1eadp h\u1ee3p th\u00f4ng tin c\u00f3 c\u1ea5u tr\u00fac. Tuy nhi\u00ean, \u0111\u1ecbnh ngh\u0129a n\u00e0y ch\u1ec9 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong l\u0129nh v\u1ef1c c\u00f4ng ngh\u1ec7 th\u00f4ng tin v\u00e0 n\u00f3 \u0111\u01b0\u1ee3c hi\u1ec3u r\u00f5 d\u01b0\u1edbi d\u1ea1ng l\u00e0 m\u1ed9t t\u1eadp h\u1ee3p c\u00e1c li\u00ean k\u1ebft d\u1eef li\u1ec7u \u0111\u1ec3 l\u01b0u tr\u1eef tr\u00ean thi\u1ebft b\u1ecb nh\u01b0 \u0111\u0129a ho\u1eb7c b\u0103ng. D\u1eef li\u1ec7u n\u00e0y \u0111\u01b0\u1ee3c duy tr\u00ec d\u01b0\u1edbi d\u1ea1ng t\u1eadp h\u1ee3p c\u00e1c th\u00f4ng tin trong h\u1ec7 \u0111i\u1ec1u h\u00e0nh hay l\u01b0u tr\u1eef h\u00f3a trong h\u1ec7 qu\u1ea3n tr\u1ecb c\u01a1 s\u1edf d\u1eef li\u1ec7u.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">T\u00f3m l\u1ea1i, c\u00f3 s\u1edf d\u1eef li\u1ec7u l\u00e0 h\u1ec7 th\u1ed1ng g\u1ed3m r\u1ea5t nhi\u1ec1u th\u00f4ng tin, d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c x\u00e2y d\u1ef1ng theo m\u1ed9t c\u1ea5u tr\u00fac nh\u1ea5t \u0111\u1ecbnh \u0111\u1ec3 \u0111\u00e1p \u1ee9ng nhu c\u1ea7u khai th\u00e1c, s\u1eed d\u1ee5ng c\u1ee7a nhi\u1ec1u ng\u01b0\u1eddi hay ch\u1ea1y nhi\u1ec1u ch\u01b0\u01a1ng tr\u00ecnh c\u00f9ng m\u1ed9t l\u00fac. Khi \u00e1p d\u1ee5ng h\u00ecnh th\u1ee9c l\u01b0u tr\u1eef n\u00e0y, s\u1ebd kh\u1eafc ph\u1ee5c \u0111\u01b0\u1ee3c nh\u1eefng \u0111i\u1ec3m y\u1ebfu c\u1ee7a vi\u1ec7c l\u01b0u file th\u00f4ng th\u01b0\u1eddng tr\u00ean m\u00e1y t\u00ednh. C\u00e1c th\u00f4ng tin d\u1eef li\u1ec7u \u0111\u1ea3m b\u1ea3o \u0111\u01b0\u1ee3c s\u1ef1 nh\u1ea5t qu\u00e1n, h\u1ea1n ch\u1ebf \u0111\u01b0\u1ee3c vi\u1ec7c tr\u00f9ng l\u1eb7p th\u00f4ng tin.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">H\u1ec7 qu\u1ea3n tr\u1ecb c\u01a1 s\u1edf d\u1eef li\u1ec7u l\u00e0 g\u00ec?<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">L\u00e0 ch\u01b0\u01a1ng tr\u00ecnh ph\u1ea7n m\u1ec1m, th\u1ef1c hi\u1ec7n vi\u1ec7c l\u01b0u tr\u1eef c\u01a1 s\u1edf d\u1eef li\u1ec7u. H\u1ec7 qu\u1ea3n tr\u1ecb CSDL khi l\u01b0u tr\u1eef d\u1eef li\u1ec7u c\u1ea7n ph\u1ea3i \u0111\u1ea3m b\u1ea3o \u0111\u01b0\u1ee3c t\u00ednh c\u1ea5u tr\u00fac trong c\u01a1 s\u1edf d\u1eef li\u1ec7u v\u00e0 c\u1ea7n ph\u1ea3i h\u1ed7 tr\u1ee3 vi\u1ec7c \u0111\u1ecdc, ch\u1ec9nh s\u1eeda, th\u00eam v\u00e0 x\u00f3a d\u1eef li\u1ec7u tr\u00ean CSDL m\u1ed9t c\u00e1ch d\u1ec5 d\u00e0ng.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C\u01a1 s\u1edf d\u1eef li\u1ec7u quan h\u1ec7 l\u00e0 g\u00ec?<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C\u01a1 s\u1edf d\u1eef li\u1ec7u quan h\u1ec7 c\u00f3 t\u00ean ti\u1ebfng anh l\u00e0 relational database. L\u00e0 c\u01a1 s\u1edf d\u1eef li\u1ec7u s\u1ed1 d\u1ef1a tr\u00ean m\u00f4 h\u00ecnh quan h\u1ec7 d\u1eef li\u1ec7u. M\u1ed9t h\u1ec7 th\u1ed1ng ph\u1ea7n m\u1ec1m s\u1eed d\u1ee5ng \u0111\u1ec3 duy tr\u00ec CSDL l\u00e0 m\u1ed9t h\u1ec7 qu\u1ea3n tr\u1ecb c\u01a1 s\u1edf d\u1eef li\u1ec7u quan h\u1ec7 RDBMS. Nhi\u1ec1u h\u1ec7 th\u1ed1ng CSDL quan h\u1ec7 c\u00f3 t\u00f9y ch\u1ecdn s\u1eed d\u1ee5ng SQL (ng\u00f4n ng\u1eef truy v\u1ea5n c\u00f3 c\u1ea5u tr\u00fac) ti\u00eau chu\u1ea9n \u0111\u1ec3 truy v\u1ea5n v\u00e0 duy tr\u00ec CSDL.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C\u1ea5u tr\u00fac d\u1eef li\u1ec7u l\u00e0 c\u00e1ch l\u01b0u tr\u1eef, t\u1ed5 ch\u1ee9c d\u1eef li\u1ec7u c\u00f3 th\u1ee9 t\u1ef1, c\u00f3 h\u1ec7 th\u1ed1ng \u0111\u1ec3 d\u1eef li\u1ec7u c\u00f3 th\u1ec3 s\u1eed d\u1ee5ng m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3. \u0110\u1ec3 hi\u1ec3u th\u00eam v\u1ec1 kh\u00e1i ni\u1ec7m c\u1ea5u tr\u00fac d\u1eef li\u1ec7u l\u00e0 g\u00ec b\u1ea1n c\u1ea7n ph\u1ea3i bi\u1ebft th\u00eam 2 kh\u00e1i ni\u1ec7m n\u1ec1n t\u1ea3ng h\u00ecnh th\u00e0nh n\u00ean c\u1ea5u tr\u00fac d\u1eef li\u1ec7u \u0111\u00f3 l\u00e0:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Interface: M\u1ed7i m\u1ed9t c\u1ea5u tr\u00fac d\u1eef li\u1ec7u s\u1ebd c\u00f3 m\u1ed9t interface. Interface s\u1ebd bi\u1ec3u di\u1ec5n m\u1ed9t t\u1eadp h\u1ee3p c\u00e1c ph\u00e9p t\u00ednh m\u00e0 m\u1ed9t c\u1ea5u tr\u00fac d\u1eef li\u1ec7u h\u1ed7 tr\u1ee3. M\u1ed9t interface s\u1ebd ch\u1ec9 cung c\u1ea5p danh s\u00e1ch c\u00e1c ph\u00e9p t\u00ednh \u0111\u01b0\u1ee3c h\u1ed7 tr\u1ee3, c\u00e1c lo\u1ea1i tham s\u1ed1 m\u00e0 ch\u00fang c\u00f3 th\u1ec3 ch\u1ea5p nh\u1eadn v\u00e0 ki\u1ec3u tr\u1ea3 v\u1ec1 c\u00e1c ph\u00e9p t\u00ednh n\u00e0y.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Implementation: Cung c\u1ea5p s\u1ef1 bi\u1ec3u di\u1ec5n n\u1ed9i b\u1ed9 c\u1ee7a c\u1ea5u tr\u00fac d\u1eef li\u1ec7u. Implementation c\u0169ng cung c\u1ea5p c\u00e1c ph\u1ea7n \u0111\u1ecbnh ngh\u0129a c\u1ee7a gi\u1ea3i thu\u1eadt \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng trong c\u00e1c ph\u00e9p t\u00ednh c\u1ee7a c\u1ea5u tr\u00fac d\u1eef li\u1ec7u.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Kh\u00e1i ni\u1ec7m th\u00f4ng tin l\u00e0 g\u00ec?<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Th\u00f4ng tin l\u00e0 s\u1ef1 ph\u1ea3n \u00e1nh c\u1ee7a s\u1ef1 v\u1eadt, hi\u1ec7n t\u01b0\u1ee3ng th\u1ebf gi\u1edbi kh\u00e1ch quan, c\u00e1c ho\u1ea1t \u0111\u1ed9ng c\u1ee7a con ng\u01b0\u1eddi trong \u0111\u1eddi s\u1ed1ng x\u00e3 h\u1ed9i; con ng\u01b0\u1eddi s\u1ebd ti\u1ebfp nh\u1eadn th\u00f4ng tin \u0111\u1ec3 t\u0103ng s\u1ef1 hi\u1ec3u bi\u1ebft cho m\u00ecnh v\u00e0 th\u1ef1c hi\u1ec7n c\u00e1c ho\u1ea1t \u0111\u1ed9ng c\u00f3 \u00edch cho c\u1ed9ng \u0111\u1ed3ng.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c lo\u1ea1i ki\u1ebfn tr\u00fac c\u1ee7a h\u1ec7 c\u01a1 s\u1edf d\u1eef li\u1ec7u<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00f3 2 lo\u1ea1i ki\u1ebfn tr\u00fac c\u1ee7a h\u1ec7 CSDL l\u00e0 t\u1eadp trung v\u00e0 ph\u00e2n t\u00e1n<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">H\u1ec7 CSDL t\u1eadp trung<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">V\u1edbi h\u1ec7 CSDL t\u1eadp trung, to\u00e0n b\u1ed9 c\u00e1c d\u1eef li\u1ec7u \u0111\u01b0\u1ee3c l\u01b0u t\u1ea1i m\u1ed9t m\u00e1y ho\u1eb7c m\u1ed9t d\u00e0n m\u00e1y. C\u00f3 3 ki\u1ec3u CSDL t\u1eadp trung<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">H\u1ec7 CSDL c\u00e1 nh\u00e2n: L\u00e0 h\u1ec7 CSDL c\u00f3 1 ng\u01b0\u1eddi d\u00f9ng, ng\u01b0\u1eddi n\u00e0y v\u1eeba <a href=\"https:\/\/www.vietlearn.org\" data-internallinksmanager029f6b8e52c=\"2\" title=\"Vietlearn\" rel=\"nofollow\">thi\u1ebft k\u1ebf<\/a>, t\u1ea1o l\u1eadp, c\u1eadp nh\u1eadt v\u00e0 b\u1ea3o tr\u00ec CSDL. \u0110\u1ed3ng th\u1eddi c\u0169ng l\u00e0 ng\u01b0\u1eddi khai th\u00e1c th\u00f4ng tin, t\u1ef1 l\u1eadp, hi\u1ec3n th\u1ecb b\u00e1o c\u00e1o.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">H\u1ec7 CSDL trung t\u00e2m: L\u00e0 h\u1ec7 \u0111\u01b0\u1ee3c \u0111\u1eb7t tr\u00ean m\u00e1y t\u00ednh trung t\u00e2m, nhi\u1ec1u ng\u01b0\u1eddi d\u00f9ng t\u1eeb xa c\u00f3 th\u1ec3 truy c\u1eadp th\u00f4ng qua c\u00e1c thi\u1ebft b\u1ecb \u0111\u1ea7u cu\u1ed1i v\u00e0 c\u00e1c ph\u01b0\u01a1ng ti\u1ec7n truy\u1ec1n th\u00f4ng.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">H\u1ec7 CSDL kh\u00e1ch \u2013 ch\u1ee7: C\u00e1c th\u00e0nh ph\u1ea7n c\u1ee7a h\u1ec7 s\u1ebd t\u01b0\u01a1ng t\u00e1c v\u1edbi nhau, t\u1ea1o n\u00ean h\u1ec7 th\u1ed1ng g\u1ed3m c\u00e1c th\u00e0nh ph\u1ea7n y\u00eau c\u1ea7u t\u00e0i nguy\u00ean v\u00e0 th\u00e0nh ph\u1ea7n c\u1ea5p t\u00e0i nguy\u00ean. \u01afu \u0111i\u1ec3m c\u1ee7a lo\u1ea1i c\u1ea5u tr\u00fac n\u00e0y l\u00e0 n\u00e2ng cao kh\u1ea3 n\u0103ng th\u1ef1c hi\u1ec7n, ng\u01b0\u1eddi d\u00f9ng d\u1ec5 d\u00e0ng b\u1ed5 sung th\u00eam m\u00e1y kh\u00e1ch,\u2026<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">H\u1ec7 CSDL ph\u00e2n t\u00e1n<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">L\u00e0 m\u1ed9t t\u1eadp h\u1ee3p c\u00e1c d\u1eef li\u1ec7u c\u00f3 li\u00ean quan, \u0111\u01b0\u1ee3c d\u00f9ng chung v\u00e0 ph\u00e2n t\u00e1n v\u1ec1 m\u1eb7t v\u1eadt l\u00fd tr\u00ean m\u1ed9t m\u1ea1ng m\u00e1y t\u00ednh. Ng\u01b0\u1eddi d\u00f9ng truy c\u1eadp v\u00e0o CSDL ph\u00e2n t\u00e1n th\u00f4ng qua c\u00e1c ch\u01b0\u01a1ng tr\u00ecnh, \u1ee9ng d\u1ee5ng. C\u1ea5u tr\u00fac ph\u00e2n t\u00e1n d\u1eef li\u1ec7u th\u00edch h\u1ee3p cho b\u1ea3n ch\u1ea5t ph\u00e2n t\u00e1n c\u00f3 nhi\u1ec1u ng\u01b0\u1eddi d\u00f9ng.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00f3 th\u1ec3 chia h\u1ec7 CSDL ph\u00e2n t\u00e1n th\u00e0nh 2 lo\u1ea1i ch\u00ednh \u0111\u00f3 l\u00e0 lo\u1ea1i thu\u1ea7n nh\u1ea5t v\u00e0 h\u1ed7n h\u1ee3p.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">H\u1ec7 CSDL ph\u00e2n t\u00e1n thu\u1ea7n nh\u1ea5t: C\u00e1c n\u00fat tr\u00ean m\u1ea1ng \u0111\u1ec1u d\u00f9ng m\u1ed9t h\u1ec7 QTCSDL.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">H\u1ec7 CSDL ph\u00e2n t\u00e1n h\u1ed7n h\u1ee3p: C\u00e1c n\u00fat tr\u00ean m\u1ea1ng s\u1ebd d\u00f9ng c\u00e1c h\u1ec7 QTCSDL kh\u00e1c nhau.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">S\u1ef1 c\u1ea7n thi\u1ebft c\u1ee7a c\u00e1c h\u1ec7 c\u01a1 s\u1edf d\u1eef li\u1ec7u<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">H\u1ec7 c\u01a1 s\u1edf d\u1eef li\u1ec7u gi\u1eef m\u1ed9t vai tr\u00f2 v\u00f4 c\u00f9ng quan tr\u1ecdng, \u0111\u00f3 l\u00e0:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Gi\u1ea3m b\u1edbt s\u1ef1 d\u01b0 th\u1eeba d\u1eef li\u1ec7u trong l\u01b0u tr\u1eef<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Trong c\u00e1c \u1ee9ng d\u1ee5ng <a href=\"https:\/\/www.vietlearn.org\" data-internallinksmanager029f6b8e52c=\"2\" title=\"Vietlearn\" rel=\"nofollow\">l\u1eadp tr\u00ecnh<\/a> truy\u1ec1n th\u1ed1ng, ph\u01b0\u01a1ng ph\u00e1p t\u1ed5 ch\u1ee9c d\u1eef li\u1ec7u v\u1eeba t\u1ed1t k\u00e9m, l\u00e3ng ph\u00ed b\u1ed9 nh\u1edb, c\u00e1c thi\u1ebft b\u1ecb l\u01b0u tr\u1eef. Nh\u01b0ng n\u1ebfu t\u1ed5 ch\u1ee9c d\u1eef li\u1ec7u theo l\u00fd thuy\u1ebft th\u00ec CSDL c\u00f3 th\u1ec3 h\u1ee3p nh\u1ea5t c\u00e1c t\u1ec7p d\u1eef li\u1ec7u l\u01b0u tr\u1eef c\u1ee7a c\u00e1c b\u00e0i to\u00e1n, ch\u01b0\u01a1ng tr\u00ecnh \u1ee9ng d\u1ee5ng c\u00f3 th\u1ec3 c\u00f9ng chia s\u1ebb ngu\u1ed3n t\u00e0i nguy\u00ean tr\u00ean m\u1ea1ng c\u00f9ng v\u1edbi h\u1ec7 CSDL.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">T\u1ed5 ch\u1ee9c l\u01b0u tr\u1eef d\u1eef li\u1ec7u theo l\u00fd thuy\u1ebft CSDL c\u00f3 th\u1ec3 tri\u1ec3n khai \u0111\u1ed3ng th\u1eddi tr\u00ean nhi\u1ec1u \u1ee9ng d\u1ee5ng c\u00f9ng CSDL<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c \u1ee9ng d\u1ee5ng kh\u00f4ng ch\u1ec9 \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 chia s\u1ebb chung t\u00e0i nguy\u00ean d\u1eef li\u1ec7u m\u00e0 c\u00f2n tr\u00ean c\u00f9ng m\u1ed9t CSDL \u0111\u1ec3 c\u00f3 th\u1ec3 tri\u1ec3n khai \u0111\u1ed3ng th\u1eddi nhi\u1ec1u \u1ee9ng d\u1ee5ng kh\u00e1c nhau tr\u00ean c\u00e1c thi\u1ebft b\u1ecb sau cu\u1ed1i.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">T\u1ed5 ch\u1ee9c d\u1eef li\u1ec7u theo c\u01a1 s\u1edf d\u1eef li\u1ec7u s\u1ebd th\u1ed1ng nh\u1ea5t c\u00e1c ti\u00eau chu\u1ea9n, th\u1ee7 t\u1ee5c v\u00e0 c\u00e1c bi\u1ec7n ph\u00e1p an to\u00e0n d\u1eef li\u1ec7u.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">C\u00e1c h\u1ec7 CSDL s\u1ebd \u0111\u01b0\u1ee3c qu\u1ea3n tr\u1ecb b\u1edfi m\u1ed9t ho\u1eb7c m\u1ed9t nh\u00f3m ng\u01b0\u1eddi qu\u1ea3n tr\u1ecb CSDL. Ng\u01b0\u1eddi qu\u1ea3n tr\u1ecb CSDL c\u00f3 th\u1ec3 \u00e1p d\u1ee5ng th\u1ed1ng nh\u1ea5t c\u00e1c ti\u00eau chu\u1ea9n, th\u1ee7 t\u1ee5c,\u2026.gi\u00fap cho c\u00f4ng vi\u1ec7c b\u1ea3o tr\u00ec d\u1eef li\u1ec7u d\u1ec5 d\u00e0ng h\u01a1n.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">V\u1edbi c\u00e1c n\u1ed9i dung th\u00f4ng tin trong b\u00e0i vi\u1ebft \u201c[Database] \u2013 Kh\u00e1i ni\u1ec7m c\u01a1 s\u1edf d\u1eef li\u1ec7u l\u00e0 g\u00ec, c\u00e1c h\u1ee3p ph\u1ea7n c\u1ee7a CSDL\u201d hy v\u1ecdng s\u1ebd gi\u00fap \u00edch b\u1ea1n. \u0110\u1ec3 c\u00f3 th\u00eam nhi\u1ec1u ki\u1ebfn th\u1ee9c h\u1eefu \u00edch kh\u00e1c, qu\u00fd b\u1ea1n \u0111\u1ecdc h\u00e3y truy c\u1eadp website Vietlearn.org \u0111\u1ec3 t\u00ecm hi\u1ec3u.<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><\/p>\n\n\n\n\n\n\n","protected":false},"excerpt":{"rendered":"<p>Ghi ch\u00fa: T\u00e0i li\u1ec7u tr\u00edch d\u1eabn V\u1edbi nh\u1eefng ai h\u1ecdc t\u1eadp, l\u00e0m vi\u1ec7c trong l\u0129nh v\u1ef1c c\u00f4ng ngh\u1ec7 th\u00f4ng tin ch\u1eafc ch\u1eafn s\u1ebd kh\u00f4ng c\u00f2n xa l\u1ea1 v\u1edbi thu\u1eadt ng\u1eef c\u01a1 s\u1edf d\u1eef li\u1ec7u. Tuy nhi\u00ean kh\u00f4ng ph\u1ea3i ai c\u0169ng c\u00f3 th\u1ec3 gi\u1ea3i th\u00edch \u0111\u01b0\u1ee3c \u0111\u1ea7y \u0111\u1ee7 kh\u00e1i ni\u1ec7m c\u01a1 s\u1edf d\u1eef li\u1ec7u l\u00e0 g\u00ec, [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":"","_disable_autopaging":false},"categories":[1],"tags":[],"class_list":["post-3629","post","type-post","status-publish","format-standard","hentry","category-general"],"_links":{"self":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/3629","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/comments?post=3629"}],"version-history":[{"count":0,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/posts\/3629\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/media?parent=3629"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/categories?post=3629"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.vietlearn.org\/kien-thuc\/wp-json\/wp\/v2\/tags?post=3629"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}