{"id":67538,"date":"2025-07-27T08:01:46","date_gmt":"2025-07-27T08:01:46","guid":{"rendered":"https:\/\/onlineexammaker.com\/kb\/?p=67538"},"modified":"2025-08-21T06:07:41","modified_gmt":"2025-08-21T06:07:41","slug":"15-database-management-quiz-questions-and-answers-vi","status":"publish","type":"post","link":"https:\/\/onlineexammaker.com\/kb\/vi\/15-database-management-quiz-questions-and-answers-vi\/","title":{"rendered":"15 C\u00e2u h\u1ecfi v\u00e0 c\u00e2u tr\u1ea3 l\u1eddi qu\u1ea3n l\u00fd c\u01a1 s\u1edf d\u1eef li\u1ec7u"},"content":{"rendered":"<p>Qu\u1ea3n l\u00fd c\u01a1 s\u1edf d\u1eef li\u1ec7u l\u00e0 qu\u00e1 tr\u00ecnh l\u01b0u tr\u1eef, t\u1ed5 ch\u1ee9c v\u00e0 qu\u1ea3n l\u00fd d\u1eef li\u1ec7u m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3 v\u00e0 an to\u00e0n. N\u00f3 li\u00ean quan \u0111\u1ebfn vi\u1ec7c thi\u1ebft k\u1ebf, tri\u1ec3n khai v\u00e0 b\u1ea3o tr\u00ec c\u01a1 s\u1edf d\u1eef li\u1ec7u \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o t\u00ednh to\u00e0n v\u1eb9n d\u1eef li\u1ec7u, t\u00ednh kh\u1ea3 d\u1ee5ng v\u00e0 kh\u1ea3 n\u0103ng truy c\u1eadp cho c\u00e1c \u1ee9ng d\u1ee5ng v\u00e0 ng\u01b0\u1eddi d\u00f9ng kh\u00e1c nhau. H\u1ec7 th\u1ed1ng qu\u1ea3n l\u00fd c\u01a1 s\u1edf d\u1eef li\u1ec7u (DBMS) \u0111\u00f3ng m\u1ed9t vai tr\u00f2 quan tr\u1ecdng trong vi\u1ec7c x\u1eed l\u00fd v\u00e0 ki\u1ec3m so\u00e1t kh\u1ed1i l\u01b0\u1ee3ng d\u1eef li\u1ec7u l\u1edbn, cho ph\u00e9p c\u00e1c t\u1ed5 ch\u1ee9c \u0111\u01b0a ra quy\u1ebft \u0111\u1ecbnh d\u1ef1a tr\u00ean d\u1eef li\u1ec7u, quy tr\u00ecnh h\u1ee3p l\u00fd h\u00f3a v\u00e0 c\u1ea3i thi\u1ec7n hi\u1ec7u qu\u1ea3 t\u1ed5ng th\u1ec3.<\/p>\n<p>C\u00e1c kh\u00eda c\u1ea1nh ch\u00ednh c\u1ee7a qu\u1ea3n l\u00fd c\u01a1 s\u1edf d\u1eef li\u1ec7u:<\/p>\n<p>M\u00f4 h\u00ecnh h\u00f3a d\u1eef li\u1ec7u: Qu\u1ea3n l\u00fd c\u01a1 s\u1edf d\u1eef li\u1ec7u b\u1eaft \u0111\u1ea7u b\u1eb1ng m\u00f4 h\u00ecnh d\u1eef li\u1ec7u, bao g\u1ed3m thi\u1ebft k\u1ebf c\u1ea5u tr\u00fac c\u01a1 s\u1edf d\u1eef li\u1ec7u, x\u00e1c \u0111\u1ecbnh b\u1ea3ng, m\u1ed1i quan h\u1ec7 v\u00e0 c\u00e1c r\u00e0ng bu\u1ed9c.<\/p>\n<p>L\u01b0u tr\u1eef d\u1eef li\u1ec7u: C\u01a1 s\u1edf d\u1eef li\u1ec7u l\u01b0u tr\u1eef d\u1eef li\u1ec7u theo \u0111\u1ecbnh d\u1ea1ng c\u00f3 c\u1ea5u tr\u00fac \u0111\u1ec3 t\u1ea1o \u0111i\u1ec1u ki\u1ec7n d\u1ec5 d\u00e0ng truy xu\u1ea5t v\u00e0 thao t\u00e1c. D\u1eef li\u1ec7u c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c l\u01b0u tr\u1eef trong c\u00e1c b\u1ea3ng, h\u00e0ng v\u00e0 c\u1ed9t.<\/p>\n<p>Truy xu\u1ea5t d\u1eef li\u1ec7u: H\u1ec7 th\u1ed1ng qu\u1ea3n l\u00fd c\u01a1 s\u1edf d\u1eef li\u1ec7u cung c\u1ea5p c\u00e1c ng\u00f4n ng\u1eef truy v\u1ea5n nh\u01b0 SQL (ng\u00f4n ng\u1eef truy v\u1ea5n c\u00f3 c\u1ea5u tr\u00fac) \u0111\u1ec3 truy xu\u1ea5t d\u1eef li\u1ec7u c\u1ee5 th\u1ec3 d\u1ef1a tr\u00ean c\u00e1c y\u00eau c\u1ea7u c\u1ee7a ng\u01b0\u1eddi d\u00f9ng.<\/p>\n<p>T\u00ednh to\u00e0n v\u1eb9n d\u1eef li\u1ec7u: \u0110\u1ea3m b\u1ea3o \u0111\u1ed9 ch\u00ednh x\u00e1c v\u00e0 t\u00ednh nh\u1ea5t qu\u00e1n c\u1ee7a d\u1eef li\u1ec7u l\u00e0 \u0111i\u1ec1u c\u1ea7n thi\u1ebft cho th\u00f4ng tin \u0111\u00e1ng tin c\u1eady v\u00e0 c\u00f3 \u00fd ngh\u0129a. Qu\u1ea3n l\u00fd c\u01a1 s\u1edf d\u1eef li\u1ec7u th\u1ef1c thi t\u00ednh to\u00e0n v\u1eb9n d\u1eef li\u1ec7u th\u00f4ng qua c\u00e1c r\u00e0ng bu\u1ed9c v\u00e0 quy t\u1eafc x\u00e1c th\u1ef1c.<\/p>\n<p>B\u1ea3o m\u1eadt d\u1eef li\u1ec7u: H\u1ec7 th\u1ed1ng qu\u1ea3n l\u00fd c\u01a1 s\u1edf d\u1eef li\u1ec7u th\u1ef1c hi\u1ec7n c\u00e1c \u0111i\u1ec1u khi\u1ec3n truy c\u1eadp v\u00e0 c\u01a1 ch\u1ebf m\u00e3 h\u00f3a \u0111\u1ec3 b\u1ea3o v\u1ec7 d\u1eef li\u1ec7u nh\u1ea1y c\u1ea3m kh\u1ecfi truy c\u1eadp v\u00e0 vi ph\u1ea1m tr\u00e1i ph\u00e9p.<\/p>\n<p>Sao l\u01b0u v\u00e0 ph\u1ee5c h\u1ed3i: C\u00e1c b\u1ea3n sao l\u01b0u v\u00e0 k\u1ebf ho\u1ea1ch ph\u1ee5c h\u1ed3i d\u1eef li\u1ec7u th\u01b0\u1eddng xuy\u00ean l\u00e0 r\u1ea5t quan tr\u1ecdng \u0111\u1ec3 b\u1ea3o v\u1ec7 d\u1eef li\u1ec7u ch\u1ed1ng l\u1ea1i s\u1ef1 c\u1ed1 h\u1ec7 th\u1ed1ng, th\u1ea3m h\u1ecda ho\u1eb7c m\u1ea5t d\u1eef li\u1ec7u t\u00ecnh c\u1edd.<\/p>\n<h3> trong b\u00e0i vi\u1ebft n\u00e0y <\/h3>\n<ul class=\"article_list\">\n<li><a href=\"#1\">Ph\u1ea7n 1: C\u00f4ng c\u1ee5 t\u1ea1o c\u00e2u \u0111\u1ed1 OnlineExamMaker AI &#8211; C\u00e1ch d\u1ec5 nh\u1ea5t \u0111\u1ec3 t\u1ea1o c\u00e2u \u0111\u1ed1 tr\u1ef1c tuy\u1ebfn<\/a><\/li>\n<li><a href=\"#2\">Ph\u1ea7n 2: 15 c\u00e2u h\u1ecfi v\u00e0 \u0111\u00e1p \u00e1n v\u1ec1 qu\u1ea3n l\u00fd c\u01a1 s\u1edf d\u1eef li\u1ec7u<\/a><\/li>\n<li><a href=\"#3\">Ph\u1ea7n 3: D\u00f9ng th\u1eed C\u00f4ng c\u1ee5 t\u1ea1o c\u00e2u h\u1ecfi OnlineExamMaker AI \u0111\u1ec3 t\u1ea1o c\u00e2u \u0111\u1ed1<\/a><\/li>\n<\/ul>\n<p><img decoding=\"async\" src=\"https:\/\/onlineexammaker.com\/kb\/wp-content\/uploads\/2023\/08\/database-management.webp\" alt=\"\"\/><\/p>\n<h3 id=\"1\">Ph\u1ea7n 1: C\u00f4ng c\u1ee5 t\u1ea1o c\u00e2u \u0111\u1ed1 OnlineExamMaker AI &#8211; C\u00e1ch d\u1ec5 nh\u1ea5t \u0111\u1ec3 t\u1ea1o c\u00e2u \u0111\u1ed1 tr\u1ef1c tuy\u1ebfn<\/h3>\n<p>Khi n\u00f3i \u0111\u1ebfn vi\u1ec7c d\u1ec5 d\u00e0ng t\u1ea1o ra \u0111\u00e1nh gi\u00e1 k\u1ef9 n\u0103ng qu\u1ea3n l\u00fd c\u01a1 s\u1edf d\u1eef li\u1ec7u, OnlineExamMaker l\u00e0 m\u1ed9t trong nh\u1eefng ph\u1ea7n m\u1ec1m l\u00e0m b\u00e0i ki\u1ec3m tra \u0111\u01b0\u1ee3c h\u1ed7 tr\u1ee3 AI t\u1ed1t nh\u1ea5t cho c\u00e1c t\u1ed5 ch\u1ee9c ho\u1eb7c doanh nghi\u1ec7p c\u1ee7a b\u1ea1n. V\u1edbi tr\u00ecnh t\u1ea1o c\u00e2u h\u1ecfi AI, ch\u1ec9 c\u1ea7n t\u1ea3i l\u00ean m\u1ed9t t\u00e0i li\u1ec7u ho\u1eb7c t\u1eeb kh\u00f3a nh\u1eadp v\u1ec1 ch\u1ee7 \u0111\u1ec1 \u0111\u00e1nh gi\u00e1 c\u1ee7a b\u1ea1n, b\u1ea1n c\u00f3 th\u1ec3 t\u1ea1o c\u00e1c c\u00e2u h\u1ecfi \u0111\u1ed1 vui ch\u1ea5t l\u01b0\u1ee3ng cao v\u1ec1 b\u1ea5t k\u1ef3 ch\u1ee7 \u0111\u1ec1, c\u1ea5p \u0111\u1ed9 kh\u00f3 v\u00e0 \u0111\u1ecbnh d\u1ea1ng n\u00e0o.<\/p>\n<p><strong> nh\u1eefng g\u00ec b\u1ea1n s\u1ebd th\u00edch: <\/strong><br \/>\n\u25cf Tr\u00ecnh t\u1ea1o c\u00e2u h\u1ecfi AI \u0111\u1ec3 gi\u00fap b\u1ea1n ti\u1ebft ki\u1ec7m th\u1eddi gian trong vi\u1ec7c t\u1ea1o c\u00e2u h\u1ecfi \u0111\u1ed1 vui.<br \/>\n\u25cf Chia s\u1ebb b\u00e0i ki\u1ec3m tra tr\u1ef1c tuy\u1ebfn c\u1ee7a b\u1ea1n v\u1edbi kh\u00e1n gi\u1ea3 tr\u00ean c\u00e1c n\u1ec1n t\u1ea3ng x\u00e3 h\u1ed9i nh\u01b0 Facebook, Twitter, Reddit v\u00e0 nhi\u1ec1u h\u01a1n n\u1eefa.<br \/>\n\u25cf Hi\u1ec3n th\u1ecb ph\u1ea3n h\u1ed3i cho c\u00e2u tr\u1ea3 l\u1eddi ch\u00ednh x\u00e1c ho\u1eb7c kh\u00f4ng ch\u00ednh x\u00e1c ngay sau khi c\u00e2u h\u1ecfi \u0111\u01b0\u1ee3c tr\u1ea3 l\u1eddi.<br \/>\n\u25cf T\u1ea1o m\u1ed9t bi\u1ec3u m\u1eabu t\u1ea1o kh\u00e1ch h\u00e0ng ti\u1ec1m n\u0103ng \u0111\u1ec3 thu th\u1eadp th\u00f4ng tin c\u1ee7a ng\u01b0\u1eddi l\u00e0m b\u00e0i ki\u1ec3m tra, ch\u1eb3ng h\u1ea1n nh\u01b0 email, \u0111i\u1ec7n tho\u1ea1i di \u0111\u1ed9ng, ti\u00eau \u0111\u1ec1 c\u00f4ng vi\u1ec7c, h\u1ed3 s\u01a1 c\u00f4ng ty, v.v.<\/p>\n<div class=\"embed_video_blog\">\n<div class=\"embed-responsive embed-responsive-16by9\" style=\"margin-bottom:16px;\">\n <iframe class=\"embed-responsive-item\" src=\"https:\/\/www.youtube.com\/embed\/zlqho9igH2Y\"><\/iframe>\n<\/div>\n<\/div>\n<div class=\"getstarted-container\">\n<p style=\"margin-bottom: 13px;\">T\u1ef1 \u0111\u1ed9ng t\u1ea1o c\u00e2u h\u1ecfi b\u1eb1ng AI<\/p>\n<div class=\"blog_double_btn clearfix\">\n<div class=\"col-sm-6  col-xs-12\">\n<div class=\"p-style-a\"><a class=\"get_started_btn\" href=\"https:\/\/onlineexammaker.com\/features\/ai-question-generator.html?refer=download_questions\" target=\"_blank\" rel=\"noopener\">Tr\u00ecnh t\u1ea1o c\u00e2u h\u1ecfi AI<\/a><\/div>\n<div class=\"p-style-b\">T\u1ea1o c\u00e2u h\u1ecfi cho b\u1ea5t k\u1ef3 ch\u1ee7 \u0111\u1ec1 n\u00e0o<\/div>\n<\/div>\n<div class=\"col-sm-6  col-xs-12\">\n<div class=\"p-style-a\"><a class=\"get_started_btn\" href=\"https:\/\/onlineexammaker.com\/sign-up.html?refer=blog_btn\"> T\u1ea1o m\u1ed9t c\u00e2u \u0111\u1ed1<\/a><\/div>\n<div class=\"p-style-b\">Mi\u1ec5n ph\u00ed 100% m\u00e3i m\u00e3i<\/div>\n<\/div>\n<\/div>\n<\/div>\n<h3 id = \"2\"> Ph\u1ea7n 2: 15 C\u00e2u h\u1ecfi v\u00e0 c\u00e2u tr\u1ea3 l\u1eddi qu\u1ea3n l\u00fd c\u01a1 s\u1edf d\u1eef li\u1ec7u <\/h3>\n<p><button id=\"copyquestionsBtn\" type=\"button\" onclick=\"myFunction()\">Sao ch\u00e9p c\u00e2u h\u1ecfi<\/button>\u00a0\u00a0or\u00a0\u00a0<button id=\"genquestionsBtn\" class=\"genbtnstyle\" type=\"button\" onclick=\"myFunction1()\">T\u1ea1o c\u00e2u h\u1ecfi b\u1eb1ng AI<\/button><\/p>\n<div id=\"copy_questions\">\n<p>C\u00e2u h\u1ecfi 1: Trong qu\u1ea3n l\u00fd c\u01a1 s\u1edf d\u1eef li\u1ec7u, DBMS \u0111\u1ea1i di\u1ec7n cho \u0111i\u1ec1u g\u00ec?<br \/>\nA. Database Management System<br \/>\nB. Data Base Management Software<br \/>\nC. Database Manipulate System<br \/>\nD. Data Management System<br \/>\n\u0110\u00e1p \u00e1n: A<br \/>\nGi\u1ea3i th\u00edch: DBMS l\u00e0 vi\u1ebft t\u1eaft c\u1ee7a Database Management System, l\u00e0 h\u1ec7 th\u1ed1ng qu\u1ea3n l\u00fd c\u01a1 s\u1edf d\u1eef li\u1ec7u gi\u00fap l\u01b0u tr\u1eef, truy xu\u1ea5t v\u00e0 qu\u1ea3n l\u00fd d\u1eef li\u1ec7u m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3.<\/p>\n<p>C\u00e2u h\u1ecfi 2: Lo\u1ea1i c\u01a1 s\u1edf d\u1eef li\u1ec7u n\u00e0o s\u1eed d\u1ee5ng b\u1ea3ng v\u00e0 kh\u00f3a \u0111\u1ec3 t\u1ed5 ch\u1ee9c d\u1eef li\u1ec7u?<br \/>\nA. C\u01a1 s\u1edf d\u1eef li\u1ec7u ph\u00e2n t\u00e1n<br \/>\nB. C\u01a1 s\u1edf d\u1eef li\u1ec7u quan h\u1ec7<br \/>\nC. C\u01a1 s\u1edf d\u1eef li\u1ec7u kh\u00f4ng quan h\u1ec7<br \/>\nD. C\u01a1 s\u1edf d\u1eef li\u1ec7u \u0111\u1ed1i t\u01b0\u1ee3ng<br \/>\n\u0110\u00e1p \u00e1n: B<br \/>\nGi\u1ea3i th\u00edch: C\u01a1 s\u1edf d\u1eef li\u1ec7u quan h\u1ec7 (RDBMS) s\u1eed d\u1ee5ng b\u1ea3ng, kh\u00f3a ch\u00ednh v\u00e0 kh\u00f3a ngo\u1ea1i \u0111\u1ec3 t\u1ed5 ch\u1ee9c d\u1eef li\u1ec7u, gi\u00fap \u0111\u1ea3m b\u1ea3o t\u00ednh to\u00e0n v\u1eb9n v\u00e0 d\u1ec5 d\u00e0ng truy v\u1ea5n.<\/p>\n<p>C\u00e2u h\u1ecfi 3: C\u00fa ph\u00e1p c\u01a1 b\u1ea3n \u0111\u1ec3 t\u1ea1o m\u1ed9t b\u1ea3ng trong SQL l\u00e0 g\u00ec?<br \/>\nA. CREATE DATABASE<br \/>\nB. INSERT INTO<br \/>\nC. CREATE TABLE<br \/>\nD. SELECT FROM<br \/>\n\u0110\u00e1p \u00e1n: C<br \/>\nGi\u1ea3i th\u00edch: L\u1ec7nh CREATE TABLE trong SQL \u0111\u01b0\u1ee3c s\u1eed d\u1ee5ng \u0111\u1ec3 t\u1ea1o m\u1ed9t b\u1ea3ng m\u1edbi v\u1edbi c\u00e1c c\u1ed9t v\u00e0 ki\u1ec3u d\u1eef li\u1ec7u t\u01b0\u01a1ng \u1ee9ng.<\/p>\n<p>C\u00e2u h\u1ecfi 4: Kh\u00f3a ch\u00ednh (Primary Key) trong c\u01a1 s\u1edf d\u1eef li\u1ec7u c\u00f3 vai tr\u00f2 g\u00ec?<br \/>\nA. L\u01b0u tr\u1eef d\u1eef li\u1ec7u b\u1ed5 sung<br \/>\nB. \u0110\u1ea3m b\u1ea3o t\u00ednh duy nh\u1ea5t v\u00e0 kh\u00f4ng null cho b\u1ea3n ghi<br \/>\nC. K\u1ebft n\u1ed1i c\u00e1c b\u1ea3ng l\u1ea1i v\u1edbi nhau<br \/>\nD. T\u1ea1o ch\u1ec9 m\u1ee5c t\u1ef1 \u0111\u1ed9ng<br \/>\n\u0110\u00e1p \u00e1n: B<br \/>\nGi\u1ea3i th\u00edch: Kh\u00f3a ch\u00ednh \u0111\u1ea3m b\u1ea3o m\u1ed7i b\u1ea3n ghi trong b\u1ea3ng l\u00e0 duy nh\u1ea5t v\u00e0 kh\u00f4ng th\u1ec3 c\u00f3 gi\u00e1 tr\u1ecb null, gi\u00fap x\u00e1c \u0111\u1ecbnh r\u00f5 r\u00e0ng t\u1eebng h\u00e0ng d\u1eef li\u1ec7u.<\/p>\n<p>C\u00e2u h\u1ecfi 5: Quy t\u1eafc chu\u1ea9n h\u00f3a 1NF (First Normal Form) y\u00eau c\u1ea7u \u0111i\u1ec1u g\u00ec?<br \/>\nA. Lo\u1ea1i b\u1ecf ph\u1ee5 thu\u1ed9c chuy\u1ec3n ti\u1ebfp<br \/>\nB. \u0110\u1ea3m b\u1ea3o m\u1ed7i c\u1ed9t ch\u1ee9a gi\u00e1 tr\u1ecb nguy\u00ean t\u1eed<br \/>\nC. Lo\u1ea1i b\u1ecf c\u00e1c kh\u00f3a l\u1eb7p l\u1ea1i<br \/>\nD. T\u1ea1o m\u1ed1i quan h\u1ec7 m\u1ed9t-nhi\u1ec1u<br \/>\n\u0110\u00e1p \u00e1n: B<br \/>\nGi\u1ea3i th\u00edch: 1NF y\u00eau c\u1ea7u m\u1ed7i c\u1ed9t trong b\u1ea3ng ph\u1ea3i ch\u1ee9a gi\u00e1 tr\u1ecb nguy\u00ean t\u1eed, kh\u00f4ng c\u00f3 m\u1ea3ng ho\u1eb7c danh s\u00e1ch, \u0111\u1ec3 tr\u00e1nh l\u1eb7p l\u1ea1i d\u1eef li\u1ec7u.<\/p>\n<p>C\u00e2u h\u1ecfi 6: ACID trong qu\u1ea3n l\u00fd giao d\u1ecbch \u0111\u1ea1i di\u1ec7n cho c\u00e1c thu\u1ed9c t\u00ednh n\u00e0o?<br \/>\nA. Atomicity, Consistency, Isolation, Durability<br \/>\nB. Accuracy, Consistency, Integrity, Data<br \/>\nC. Atomicity, Control, Isolation, Design<br \/>\nD. Availability, Consistency, Integrity, Durability<br \/>\n\u0110\u00e1p \u00e1n: A<br \/>\nGi\u1ea3i th\u00edch: ACID bao g\u1ed3m Atomicity (t\u1ea5t c\u1ea3 ho\u1eb7c kh\u00f4ng), Consistency (d\u1eef li\u1ec7u nh\u1ea5t qu\u00e1n), Isolation (c\u00e1ch ly giao d\u1ecbch), v\u00e0 Durability (b\u1ec1n v\u1eefng sau khi ho\u00e0n th\u00e0nh).<\/p>\n<p>C\u00e2u h\u1ecfi 7: Lo\u1ea1i join n\u00e0o trong SQL k\u1ebft h\u1ee3p t\u1ea5t c\u1ea3 c\u00e1c h\u00e0ng t\u1eeb c\u1ea3 hai b\u1ea3ng?<br \/>\nA. Inner Join<br \/>\nB. Left Join<br \/>\nC. Full Outer Join<br \/>\nD. Right Join<br \/>\n\u0110\u00e1p \u00e1n: C<br \/>\nGi\u1ea3i th\u00edch: Full Outer Join k\u1ebft h\u1ee3p t\u1ea5t c\u1ea3 c\u00e1c h\u00e0ng t\u1eeb c\u1ea3 hai b\u1ea3ng, bao g\u1ed3m c\u1ea3 h\u00e0ng kh\u00f4ng kh\u1edbp, \u0111\u1ec3 hi\u1ec3n th\u1ecb d\u1eef li\u1ec7u \u0111\u1ea7y \u0111\u1ee7.<\/p>\n<p>C\u00e2u h\u1ecfi 8: Ch\u1ec9 m\u1ee5c (Index) trong c\u01a1 s\u1edf d\u1eef li\u1ec7u d\u00f9ng \u0111\u1ec3 l\u00e0m g\u00ec?<br \/>\nA. T\u0103ng t\u1ed1c \u0111\u1ed9 truy v\u1ea5n d\u1eef li\u1ec7u<br \/>\nB. L\u01b0u tr\u1eef d\u1eef li\u1ec7u b\u1ed5 sung<br \/>\nC. X\u00f3a b\u1ecf d\u1eef li\u1ec7u th\u1eeba<br \/>\nD. T\u1ea1o kh\u00f3a ch\u00ednh t\u1ef1 \u0111\u1ed9ng<br \/>\n\u0110\u00e1p \u00e1n: A<br \/>\nGi\u1ea3i th\u00edch: Ch\u1ec9 m\u1ee5c gi\u00fap t\u0103ng t\u1ed1c \u0111\u1ed9 truy v\u1ea5n b\u1eb1ng c\u00e1ch t\u1ea1o c\u1ea5u tr\u00fac d\u1eef li\u1ec7u cho ph\u00e9p t\u00ecm ki\u1ebfm nhanh h\u01a1n m\u00e0 kh\u00f4ng c\u1ea7n qu\u00e9t to\u00e0n b\u1ed9 b\u1ea3ng.<\/p>\n<p>C\u00e2u h\u1ecfi 9: Trong m\u00f4 h\u00ecnh ER, th\u1ef1c th\u1ec3 (Entity) \u0111\u1ea1i di\u1ec7n cho \u0111i\u1ec1u g\u00ec?<br \/>\nA. M\u1ed1i quan h\u1ec7 gi\u1eefa c\u00e1c b\u1ea3ng<br \/>\nB. M\u1ed9t \u0111\u1ed1i t\u01b0\u1ee3ng ho\u1eb7c kh\u00e1i ni\u1ec7m trong th\u1ebf gi\u1edbi th\u1ef1c<br \/>\nC. C\u00e1c thu\u1ed9c t\u00ednh c\u1ee7a kh\u00f3a ngo\u1ea1i<br \/>\nD. C\u00e1c r\u00e0ng bu\u1ed9c d\u1eef li\u1ec7u<br \/>\n\u0110\u00e1p \u00e1n: B<br \/>\nGi\u1ea3i th\u00edch: Th\u1ef1c th\u1ec3 trong m\u00f4 h\u00ecnh ER l\u00e0 m\u1ed9t \u0111\u1ed1i t\u01b0\u1ee3ng ho\u1eb7c kh\u00e1i ni\u1ec7m c\u00f3 th\u1ec3 l\u01b0u tr\u1eef d\u1eef li\u1ec7u, nh\u01b0 &#8220;Kh\u00e1ch h\u00e0ng&#8221; ho\u1eb7c &#8220;S\u1ea3n ph\u1ea9m&#8221;.<\/p>\n<p>C\u00e2u h\u1ecfi 10: T\u00ednh to\u00e0n v\u1eb9n d\u1eef li\u1ec7u (Data Integrity) bao g\u1ed3m nh\u1eefng lo\u1ea1i n\u00e0o?<br \/>\nA. Entity Integrity v\u00e0 Referential Integrity<br \/>\nB. Data Integrity v\u00e0 System Integrity<br \/>\nC. Key Integrity v\u00e0 Table Integrity<br \/>\nD. Row Integrity v\u00e0 Column Integrity<br \/>\n\u0110\u00e1p \u00e1n: A<br \/>\nGi\u1ea3i th\u00edch: T\u00ednh to\u00e0n v\u1eb9n d\u1eef li\u1ec7u bao g\u1ed3m Entity Integrity (kh\u00f3a ch\u00ednh kh\u00f4ng null) v\u00e0 Referential Integrity (kh\u00f3a ngo\u1ea1i tham chi\u1ebfu \u0111\u00fang).<\/p>\n<p>C\u00e2u h\u1ecfi 11: Giao d\u1ecbch (Transaction) trong c\u01a1 s\u1edf d\u1eef li\u1ec7u ph\u1ea3i \u0111\u1ea3m b\u1ea3o thu\u1ed9c t\u00ednh n\u00e0o \u0111\u1ec3 tr\u00e1nh l\u1ed7i?<br \/>\nA. Consistency<br \/>\nB. Availability<br \/>\nC. Scalability<br \/>\nD. Redundancy<br \/>\n\u0110\u00e1p \u00e1n: A<br \/>\nGi\u1ea3i th\u00edch: Giao d\u1ecbch ph\u1ea3i \u0111\u1ea3m b\u1ea3o t\u00ednh Consistency, ngh\u0129a l\u00e0 d\u1eef li\u1ec7u ph\u1ea3i \u1edf tr\u1ea1ng th\u00e1i h\u1ee3p l\u1ec7 tr\u01b0\u1edbc v\u00e0 sau giao d\u1ecbch.<\/p>\n<p>C\u00e2u h\u1ecfi 12: View trong SQL l\u00e0 g\u00ec?<br \/>\nA. M\u1ed9t b\u1ea3ng v\u1eadt l\u00fd l\u01b0u tr\u1eef d\u1eef li\u1ec7u<br \/>\nB. M\u1ed9t truy v\u1ea5n \u0111\u00e3 l\u01b0u \u0111\u1ec3 truy c\u1eadp d\u1eef li\u1ec7u \u1ea3o<br \/>\nC. M\u1ed9t ch\u1ec9 m\u1ee5c t\u1ef1 \u0111\u1ed9ng<br \/>\nD. M\u1ed9t kh\u00f3a ngo\u1ea1i<br \/>\n\u0110\u00e1p \u00e1n: B<br \/>\nGi\u1ea3i th\u00edch: View l\u00e0 m\u1ed9t truy v\u1ea5n \u0111\u00e3 l\u01b0u, cho ph\u00e9p truy c\u1eadp d\u1eef li\u1ec7u t\u1eeb m\u1ed9t ho\u1eb7c nhi\u1ec1u b\u1ea3ng m\u00e0 kh\u00f4ng thay \u0111\u1ed5i d\u1eef li\u1ec7u g\u1ed1c.<\/p>\n<p>C\u00e2u h\u1ecfi 13: Stored Procedure l\u00e0 g\u00ec trong qu\u1ea3n l\u00fd c\u01a1 s\u1edf d\u1eef li\u1ec7u?<br \/>\nA. M\u1ed9t t\u1eadp h\u1ee3p c\u00e1c l\u1ec7nh SQL \u0111\u01b0\u1ee3c l\u01b0u tr\u1eef v\u00e0 th\u1ef1c thi<br \/>\nB. M\u1ed9t lo\u1ea1i kh\u00f3a ch\u00ednh<br \/>\nC. M\u1ed9t c\u01a1 ch\u1ebf sao l\u01b0u d\u1eef li\u1ec7u<br \/>\nD. M\u1ed9t giao di\u1ec7n ng\u01b0\u1eddi d\u00f9ng<br \/>\n\u0110\u00e1p \u00e1n: A<br \/>\nGi\u1ea3i th\u00edch: Stored Procedure l\u00e0 m\u1ed9t t\u1eadp h\u1ee3p c\u00e1c l\u1ec7nh SQL \u0111\u01b0\u1ee3c l\u01b0u tr\u1eef trong c\u01a1 s\u1edf d\u1eef li\u1ec7u, c\u00f3 th\u1ec3 \u0111\u01b0\u1ee3c g\u1ecdi l\u1ea1i \u0111\u1ec3 th\u1ef1c thi c\u00e1c t\u00e1c v\u1ee5 l\u1eb7p l\u1ea1i.<\/p>\n<p>C\u00e2u h\u1ecfi 14: Quy tr\u00ecnh sao l\u01b0u v\u00e0 ph\u1ee5c h\u1ed3i d\u1eef li\u1ec7u trong c\u01a1 s\u1edf d\u1eef li\u1ec7u nh\u1eb1m m\u1ee5c \u0111\u00edch g\u00ec?<br \/>\nA. T\u0103ng t\u1ed1c \u0111\u1ed9 truy v\u1ea5n<br \/>\nB. \u0110\u1ea3m b\u1ea3o d\u1eef li\u1ec7u c\u00f3 th\u1ec3 kh\u00f4i ph\u1ee5c sau s\u1ef1 c\u1ed1<br \/>\nC. T\u1ea1o th\u00eam kh\u00f4ng gian l\u01b0u tr\u1eef<br \/>\nD. Lo\u1ea1i b\u1ecf c\u00e1c kh\u00f3a th\u1eeba<br \/>\n\u0110\u00e1p \u00e1n: B<br \/>\nGi\u1ea3i th\u00edch: Sao l\u01b0u v\u00e0 ph\u1ee5c h\u1ed3i gi\u00fap b\u1ea3o v\u1ec7 d\u1eef li\u1ec7u kh\u1ecfi m\u1ea5t m\u00e1t do h\u1ecfng h\u00f3c, l\u1ed7i ho\u1eb7c t\u1ea5n c\u00f4ng, \u0111\u1ea3m b\u1ea3o t\u00ednh li\u00ean t\u1ee5c.<\/p>\n<p>C\u00e2u h\u1ecfi 15: Data Warehouse kh\u00e1c v\u1edbi c\u01a1 s\u1edf d\u1eef li\u1ec7u giao d\u1ecbch \u1edf \u0111i\u1ec3m n\u00e0o?<br \/>\nA. Data Warehouse t\u1eadp trung v\u00e0o ph\u00e2n t\u00edch d\u1eef li\u1ec7u l\u1ecbch s\u1eed<br \/>\nB. C\u01a1 s\u1edf d\u1eef li\u1ec7u giao d\u1ecbch d\u00f9ng cho l\u01b0u tr\u1eef h\u00e0ng ng\u00e0y<br \/>\nC. Data Warehouse kh\u00f4ng h\u1ed7 tr\u1ee3 truy v\u1ea5n<br \/>\nD. C\u1ea3 A v\u00e0 B<br \/>\n\u0110\u00e1p \u00e1n: D<br \/>\nGi\u1ea3i th\u00edch: Data Warehouse \u0111\u01b0\u1ee3c thi\u1ebft k\u1ebf \u0111\u1ec3 l\u01b0u tr\u1eef v\u00e0 ph\u00e2n t\u00edch d\u1eef li\u1ec7u l\u1ecbch s\u1eed, trong khi c\u01a1 s\u1edf d\u1eef li\u1ec7u giao d\u1ecbch t\u1eadp trung v\u00e0o c\u00e1c ho\u1ea1t \u0111\u1ed9ng h\u00e0ng ng\u00e0y nhanh ch\u00f3ng.<\/p>\n<\/div>\n<p><button id=\"copyquestionsBtn\" type=\"button\" onclick=\"myFunction()\">Sao ch\u00e9p c\u00e2u h\u1ecfi<\/button>\u00a0\u00a0or\u00a0\u00a0<button id=\"genquestionsBtn\" class=\"genbtnstyle\" type=\"button\" onclick=\"myFunction1()\">T\u1ea1o c\u00e2u h\u1ecfi b\u1eb1ng AI<\/button><\/p>\n<h3 id = \"3\">Ph\u1ea7n 3: D\u00f9ng th\u1eed C\u00f4ng c\u1ee5 t\u1ea1o c\u00e2u h\u1ecfi OnlineExamMaker AI \u0111\u1ec3 t\u1ea1o c\u00e2u \u0111\u1ed1<\/h3>\n<div class=\"embed_video_blog\">\n<div class=\"embed-responsive embed-responsive-16by9\" style=\"margin-bottom:16px;\">\n <iframe class=\"embed-responsive-item\" src=\"https:\/\/www.youtube.com\/embed\/zlqho9igH2Y\"><\/iframe>\n<\/div>\n<\/div>\n<div class=\"getstarted-container\">\n<p style=\"margin-bottom: 13px;\">T\u1ef1 \u0111\u1ed9ng t\u1ea1o c\u00e2u h\u1ecfi b\u1eb1ng AI<\/p>\n<div class=\"blog_double_btn clearfix\">\n<div class=\"col-sm-6  col-xs-12\">\n<div class=\"p-style-a\"><a class=\"get_started_btn\" href=\"https:\/\/onlineexammaker.com\/features\/ai-question-generator.html?refer=download_questions\" target=\"_blank\" rel=\"noopener\">Tr\u00ecnh t\u1ea1o c\u00e2u h\u1ecfi AI<\/a><\/div>\n<div class=\"p-style-b\">T\u1ea1o c\u00e2u h\u1ecfi cho b\u1ea5t k\u1ef3 ch\u1ee7 \u0111\u1ec1 n\u00e0o<\/div>\n<\/div>\n<div class=\"col-sm-6  col-xs-12\">\n<div class=\"p-style-a\"><a class=\"get_started_btn\" href=\"https:\/\/onlineexammaker.com\/sign-up.html?refer=blog_btn\"> T\u1ea1o m\u1ed9t c\u00e2u \u0111\u1ed1<\/a><\/div>\n<div class=\"p-style-b\">Mi\u1ec5n ph\u00ed 100% m\u00e3i m\u00e3i<\/div>\n<\/div>\n<\/div>\n<\/div>\n<p><script src=\"https:\/\/unpkg.com\/@popperjs\/core@2\"><\/script><br \/>\n<script src=\"https:\/\/unpkg.com\/tippy.js@6\"><\/script><\/p>\n<p><script type=\"text\/javascript\">\nfunction myFunction() {\nvar copyText = document.getElementById(\"copy_questions\");console.log(copyText.innerText);navigator.clipboard.writeText(copyText.innerText);\n}\nfunction myFunction1() {\n\u00a0  \u00a0 \u00a0 window.open(\"https:\/\/onlineexammaker.com\/features\/ai-question-generator.html\");\n\u00a0 }\nvar copy1, copy2;\n        tippy('#copyquestionsBtn', {\n        'content': \"Copy questions to clipboard\",\n       trigger: 'mouseenter',\n       'onCreate':function(instance){\n              copy1 = instance;\n       },\n       'onTrigger' : function(instance, event) {\n              copy2.hide();\n       }\n       });\n       tippy('#copyquestionsBtn', {\n       'content': \"Copied successfully\",\n       trigger: 'click',\n       'onCreate':function(instance){\n              copy2 = instance;\n       },\n       'onTrigger' : function(instance, event) {\n              copy1.hide();\n       }\n       });\ntippy('#genquestionsBtn', {\n        'content': \"Generate questions using AI for free\",\n         trigger: 'mouseenter'\n       });\n<\/script><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Qu\u1ea3n l\u00fd c\u01a1 s\u1edf d\u1eef li\u1ec7u l\u00e0 qu\u00e1 tr\u00ecnh l\u01b0u tr\u1eef, t\u1ed5 ch\u1ee9c v\u00e0 qu\u1ea3n l\u00fd d\u1eef li\u1ec7u m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3 v\u00e0 an to\u00e0n. N\u00f3 li\u00ean quan \u0111\u1ebfn vi\u1ec7c thi\u1ebft k\u1ebf, tri\u1ec3n khai v\u00e0 b\u1ea3o tr\u00ec c\u01a1 s\u1edf d\u1eef li\u1ec7u \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o t\u00ednh to\u00e0n v\u1eb9n d\u1eef li\u1ec7u, t\u00ednh kh\u1ea3 d\u1ee5ng v\u00e0 kh\u1ea3 n\u0103ng [&hellip;]<\/p>\n","protected":false},"author":7,"featured_media":17091,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[6049],"tags":[],"class_list":["post-67538","post","type-post","status-publish","format-standard","hentry","category-questions-answers-vi"],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v20.9 - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>15 C\u00e2u h\u1ecfi v\u00e0 c\u00e2u tr\u1ea3 l\u1eddi qu\u1ea3n l\u00fd c\u01a1 s\u1edf d\u1eef li\u1ec7u - OnlineExamMaker Blog<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/onlineexammaker.com\/kb\/vi\/15-database-management-quiz-questions-and-answers-vi\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"15 C\u00e2u h\u1ecfi v\u00e0 c\u00e2u tr\u1ea3 l\u1eddi qu\u1ea3n l\u00fd c\u01a1 s\u1edf d\u1eef li\u1ec7u - OnlineExamMaker Blog\" \/>\n<meta property=\"og:description\" content=\"Qu\u1ea3n l\u00fd c\u01a1 s\u1edf d\u1eef li\u1ec7u l\u00e0 qu\u00e1 tr\u00ecnh l\u01b0u tr\u1eef, t\u1ed5 ch\u1ee9c v\u00e0 qu\u1ea3n l\u00fd d\u1eef li\u1ec7u m\u1ed9t c\u00e1ch hi\u1ec7u qu\u1ea3 v\u00e0 an to\u00e0n. 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