{"id":103336,"date":"2026-09-10T10:09:03","date_gmt":"2026-09-10T02:09:03","guid":{"rendered":"https:\/\/www.wsisp.com\/helps\/103336.html"},"modified":"2026-09-10T10:09:03","modified_gmt":"2026-09-10T02:09:03","slug":"mysql%e8%a7%86%e5%9b%be%e5%92%8c%e4%b8%89%e8%a1%a8","status":"publish","type":"post","link":"https:\/\/www.wsisp.com\/helps\/103336.html","title":{"rendered":"mysql\u89c6\u56fe\u548c\u4e09\u8868"},"content":{"rendered":"

\u4e00\u3001\u89c6\u56fe\u7684\u4ecb\u7ecd
\n1\u3001\u5b9a\u4e49：\u89c6\u56fe\u662f\u4e00\u4e2a\u865a\u62df\u8868 \u5b83\u4e0d\u5728\u6570\u636e\u5e93\u4e2d\u4ee5\u5b58\u50a8\u7684\u5f62\u5f0f\u4fdd\u5b58，（\u672c\u8eab\u4e0d\u5305\u542b\u6570\u636e），\u662f\u5728\u4f7f\u7528\u89c6\u56fe\u7684\u65f6\u5019\u52a8\u6001\u751f\u6210\u3002
\n2\u3001\u89c6\u56fe\u7684\u4f18\u70b9？
\n（1）\u63d0\u9ad8\u67e5\u8be2\u6548\u7387
\n\u6570\u636e\u5e93\u4e2d\u7684\u6570\u636e\u67e5\u8be2\u975e\u5e38\u590d\u6742，\u53ef\u4ee5\u7b80\u5316sql\u8bed\u53e5
\n（2）\u5b89\u5168
\n\u6709\u4e9b\u4fdd\u5bc6\u5b57\u6bb5，\u53ef\u4ee5\u901a\u8fc7\u521b\u5efa\u89c6\u56fe\u9650\u5236\u7528\u6237\u5bf9\u67d0\u4e9b\u5b57\u6bb5\u8fdb\u884c\u64cd\u4f5c
\n（3）\u7b80\u5355
\n\u4e0d\u9700\u8981\u5173\u5fc3\u540e\u9762\u5bf9\u5e94\u7684\u8868\u7ed3\u6784
\n3\u3001\u89c6\u56fe\u7684\u7f3a\u70b9？
\n（1）\u6027\u80fd\u5dee
\n\u628a\u89c6\u56fe\u67e5\u8be2\u7ed3\u679c\u8f6c\u6362\u6210\u5bf9\u8868\u7684\u67e5\u8be2
\n（2）\u4fee\u6539\u9650\u5236
\n\u4fee\u6539\u89c6\u56fe\u6570\u636e，\u5fc5\u987b\u628a\u5b83\u8f6c\u5316\u4e3a\u5bf9\u57fa\u7840\u8868\u7684\u4fee\u6539
\n\u4e8c\u3001\u8bd5\u56fe\u4f7f\u7528
\n1\u3001\u521b\u5efa\u4e00\u4e2a\u89c6\u56fe
\n\u683c\u5f0f：create \u00a0 view \u00a0 \u89c6\u56fe\u540d as \u00a0（sql\u8bed\u53e5）<\/p>\n

\u5982;create \u00a0view \u00a0st1 as (
\nselect \u00a0sid,dept_name,name from \u00a0dept INNER JOIN emp \u00a0on dept1=dept2
\n\u00a0)
\nselect \u00a0* from \u00a0 st1 \u00a0;
\n\u6848\u4f8b：
\ncreate \u00a0view \u00a0st10 as(\u00a0
\nselect \u00a0* from \u00a0emp where \u00a0 \u00a0dept2=101
\n);<\/p>\n

2\u3001\u67e5\u770b\u6240\u6709\u7684\u8868（\u7269\u7406\u8868\u4e2d\u6ca1\u6709\u89c6\u56fe）
\nshow tables \u00a0<\/p>\n

3\u3001\u67e5\u8be2\u89c6\u56fe
\n\u683c\u5f0f：select \u00a0* from \u00a0 \u89c6\u56fe\u540d \u00a0;
\n\u5982：select \u00a0* from \u00a0 st1 \u00a0;<\/p>\n

4\u3001\u67e5\u770b\u521b\u5efa\u597d\u7684\u89c6\u56fe
\nshow \u00a0 create \u00a0view \u00a0 \u00a0\u89c6\u56fe\u540d
\n\u5982：show \u00a0create \u00a0view \u00a0st1 ;<\/p>\n

5\u3001\u5220\u9664\u89c6\u56fe
\n\u683c\u5f0f：drop \u00a0view \u00a0\u89c6\u56fe\u540d ;
\n\u5982：drop \u00a0view \u00a0st2 ;<\/p>\n

\u4e09\u3001\u8bd5\u56fe\u7684\u7279\u70b9
\n1\u3001\u89c6\u56fe\u662f\u7531\u57fa\u7840\u8868\u4ea7\u751f\u7684\u865a\u62df\u8868；
\n\u00a0\u5982：\u57fa\u7840\u8868\u5220\u9664，\u89c6\u56fe\u5c31\u65e0\u6548
\n2\u3001\u89c6\u56fe\u7684\u521b\u5efa\u4e0d\u5f71\u54cd\u57fa\u7840\u8868
\n\u5982：\u521b\u5efa\u591a\u4e2a\u89c6\u56fe，\u90fd\u4e0d\u5f71\u54cd\u57fa\u7840\u8868
\n3\u3001\u5220\u9664\u89c6\u56fe\u4e0d\u5f71\u54cd\u57fa\u7840\u8868
\n4\u3001\u89c6\u56fe\u5220\u9664\u6570\u636e，\u57fa\u7840\u8868\u4e5f\u540c\u65f6\u5220\u9664\u6570\u636e（\u5408\u8868\u7684\u8868\u65e0\u6cd5\u5220\u9664，\u5355\u8868\u53ef\u4ee5\u5220\u9664）
\n5\u3001\u57fa\u7840\u8868\u5220\u9664\u6570\u636e，\u89c6\u56fe\u4e5f\u5220\u9664\u6570\u636e，
\n6\u3001\u89c6\u56fe\u4e0d\u80fd\u4fee\u6539\u8868\u5b57\u6bb5，\u4e0d\u80fd\u5bf9\u8868\u5b57\u6bb5\u5220\u9664<\/p>\n

\u56db\u3001\u9762\u8bd5\u9898
\n1\u3001\u4ec0\u4e48\u662f\u89c6\u56fe？
\n2\u3001\u89c6\u56fe\u662f\u7528\u6765\u5e72\u4ec0\u4e48？
\n3\u3001\u89c6\u56fe\u7684\u4f18\u7f3a\u70b9？
\n4\u3001\u5982\u4f55\u521b\u5efa\u89c6\u56fe？
\n5\u3001\u5982\u4f55\u5220\u9664\u4e00\u4e2a\u89c6\u56fe？<\/p>\n<\/p>\n

\u4e00\u3001\u5efa\u8868
\ncreate table student1(
\nstu_no int,
\nstu_name varchar(10),
\nsex char(1),
\nage int(3),
\nedit varchar(20) )
\nDEFAULT \u00a0charset=utf8;
\ninsert into student1 values
\n\u00a0(1,'wang','\u7537',21,'hello'),
\n(2,'\u5c0f\u660e','\u5973',22,'haha2'),
\n(3,'hu','\u5973',23,'haha3'),
\n(4,'li','\u7537',25,'haha4');
\ncreate table course(
\nc_no int,
\nc_name varchar(10)
\n)
\nDEFAULT \u00a0charset=utf8;<\/p>\n

insert into course values
\n(1,'\u8ba1\u7b97\u673a\u539f\u7406'),
\n(2,'java'),
\n(3,'c'),
\n(4,'php'),
\n(5,'py');
\n#drop \u00a0table \u00a0 sc;
\ncreate table sc(
\nsc_no int,
\nstu_no int,
\nc_no int,
\nscore int(3))
\nDEFAULT \u00a0charset=utf8;
\ninsert into sc values
\n(1,1,1,80),
\n(2,2,2,90),
\n(3,2,1,85),
\n(4,2,3,70),
\n(5,2,4,95),
\n(6,2,5,89);<\/p>\n

select \u00a0* from sc;
\nselect \u00a0* from student1;
\nselect \u00a0* from course;<\/p>\n

\u4e8c\u3001\u5206\u6790\u8868
\nStudent1\u5b66\u751f\u8868（\u5b66\u751f\u5b66\u53f7\u3001\u59d3\u540d\u3001\u6027\u522b\u3001\u5e74\u9f84\u3001\u7f16\u8f91）
\nCourse\u8bfe\u7a0b\u8868（\u8bfe\u7a0b\u7f16\u53f7\u3001\u8bfe\u7a0b\u540d\u79f0）
\nsc\u9009\u8bfe\u8868（\u9009\u8bfe\u7f16\u53f7\u3001\u5b66\u751f\u5b66\u53f7\u3001\u8bfe\u7a0b\u7f16\u53f7\u3001\u6210\u7ee9）
\n\u5173\u8054\u5173\u7cfb：
\n\u90fd\u548csc\u8868\u5173\u7cfb
\nCourse .\u8bfe\u7a0b\u7f16\u53f7= sc.\u8bfe\u7a0b\u7f16\u53f7
\nStudent1.\u5b66\u751f\u5b66\u53f7=sc.\u5b66\u751f\u5b66\u53f7<\/p>\n

\u4e09\u3001\u4e09\u8868\u8fde\u63a5
\n（1）\u5148\u8fde\u63a52\u4e2a\u8868，\u5728\u548c\u7b2c\u4e09\u8868\u8fde\u63a5
\n\u683c\u5f0f：<\/p>\n

\u5982\u201cselect \u00a0a.* ,b.sc_no,b.c_no ,b.score from student1 \u00a0a INNER JOIN \u00a0sc b on a.stu_no=b.stu_no\u00a0
\n\u5907\u6ce8：\u6709\u91cd\u590d\u5217\u7684\u89e3\u51b3\u65b9\u6cd5：\u663e\u793a\u4e00\u4e2a\u8868\u6240\u6709\u5185\u5bb9，\u5728\u8fdb\u884c\u5173\u8054
\n\u5982：a.*\u663e\u793a\u6240\u6709\u7684a\u8868 \u00a0，\u5bf9\u5e94\u7684\u8868\u589e\u5220\u6539\u67e5<\/p>\n

（2）\u5185\u8fde\u63a5
\n\u683c\u5f0f：
\nselect \u00a0* \u00a0from \u88681 \u522b\u540d1 INNER JOIN \u88682 \u522b\u540d2 on \u88681.\u5173\u8054\u5b57\u6bb5=\u88682.\u5173\u8054\u5b57\u6bb5 \u00a0INNER JOIN \u00a0\u8868\u4e09 \u00a0\u8868\u540d \u00a0 on \u00a0\u88682.\u5173\u8054\u5b57\u6bb5=\u88683\u5173\u8054\u5b57\u6bb5
\n\u5982：select \u00a0* \u00a0from student1 x INNER JOIN sc y on x.stu_no=y.stu_No \u00a0INNER JOIN \u00a0course c \u00a0on \u00a0y.c_no=c.c_no
\n（3）\u5de6\u8fde\u63a5
\n\u683c\u5f0f：
\nselect \u00a0* \u00a0from \u88681 \u522b\u540d1 left JOIN \u88682 \u522b\u540d2 on \u88681.\u5173\u8054\u5b57\u6bb5=\u88682.\u5173\u8054\u5b57\u6bb5 \u00a0 left JOIN \u00a0\u8868\u4e09 \u00a0\u8868\u540d \u00a0 on \u00a0\u88682.\u5173\u8054\u5b57\u6bb5=\u88683\u5173\u8054\u5b57\u6bb5<\/p>\n

（4）\u53f3\u8fde\u63a5
\n\u683c\u5f0f：
\nselect \u00a0* \u00a0from \u88681 \u522b\u540d1 right JOIN \u88682 \u522b\u540d2 on \u88681.\u5173\u8054\u5b57\u6bb5=\u88682.\u5173\u8054\u5b57\u6bb5 \u00a0 right JOIN \u00a0\u8868\u4e09 \u00a0\u8868\u540d \u00a0 on \u00a0\u88682.\u5173\u8054\u5b57\u6bb5=\u88683\u5173\u8054\u5b57\u6bb5<\/p>\n

\u5982
\nselect \u00a0* \u00a0from student1 x right JOIN sc y on x.stu_no=y.stu_no \u00a0right JOIN \u00a0course c \u00a0on \u00a0y.c_no=c.c_no<\/p>\n

（5）\u5185\u8fde\u63a5\u7684\u4e09\u8868\u8fde\u63a5
\n\u683c\u5f0f：
\nselect * \u00a0 _name \u00a0 from \u00a0\u88681 a ,\u88682 b ,\u88683 c where \u88681.\u5173\u8054\u5b57\u6bb5=\u88682.\u5173\u8054\u5b57\u6bb5 and \u88682.\u5173\u8054\u5b57\u6bb5=\u88683.\u5173\u8054\u5b57\u6bb5 \u00a0\u00a0
\n\u6848\u4f8b：
\nselect \u00a0a.stu_no,a.stu_name \u00a0 from \u00a0student1 a ,sc b ,course c where a.stu_no=b.stu_no and b.c_no=c.c_no ；<\/p>\n

\u4e09\u3001\u4f5c\u4e1a：
\n（1）\u5199\u4e00\u4e2aSQL\u8bed\u53e5，\u67e5\u8be2\u9009\u4fee\u4e86\u201c\u8ba1\u7b97\u673a\u539f\u7406\u201d\u7684\u5b66\u751f\u5b66\u53f7\u548c\u59d3\u540d
\nselect a.stu_no,a.stu_name from student1 a inner join sc b on a.stu_no=b.stu_no inner join course c on b.c_no=c.c_no where c.c_name="\u8ba1\u7b97\u673a\u539f\u7406"<\/p>\n

（2）\u5199\u4e00\u4e2aSQL\u8bed\u53e5，\u67e5\u8be2\u201c\u5c0f\u660e\u201d\u540c\u5b66\u9009\u4fee\u7684\u8bfe\u7a0b\u540d\u79f0
\nselect c_name from \u00a0student1 x inner join sc y on x.stu_no=y.stu_no\u00a0
\nINNER JOIN course z on y.c_no=z.c_no where stu_name="\u5c0f\u660e";<\/p>\n

（3）\u5199\u4e00\u4e2aSQL\u8bed\u53e5，\u67e5\u8be2\u9009\u4fee\u4e865\u95e8\u8bfe\u7a0b\u7684\u5b66\u751f\u5b66\u53f7\u548c\u59d3\u540d<\/p>\n

select s.stu_no,s.stu_name
\nfrom student1 s\u00a0
\njoin sc on s.stu_no=sc.stu_no
\ngroup by s.stu_no
\nhaving count(sc.c_no)=5;
\n\u00a0<\/p>\n","protected":false},"excerpt":{"rendered":"

\u4e00\u3001\u89c6\u56fe\u7684\u4ecb\u7ecd
\n1\u3001\u5b9a\u4e49：\u89c6\u56fe\u662f\u4e00\u4e2a\u865a\u62df\u8868 \u5b83\u4e0d\u5728\u6570\u636e\u5e93\u4e2d\u4ee5\u5b58\u50a8\u7684\u5f62\u5f0f\u4fdd\u5b58，（\u672c\u8eab\u4e0d\u5305\u542b\u6570\u636e），\u662f\u5728\u4f7f\u7528\u89c6\u56fe\u7684\u65f6\u5019\u52a8\u6001\u751f\u6210\u3002
\n2\u3001\u89c6\u56fe\u7684\u4f18\u70b9？
\n（1）\u63d0\u9ad8\u67e5\u8be2\u6548\u7387
\n\u6570\u636e\u5e93\u4e2d\u7684\u6570\u636e\u67e5\u8be2\u975e\u5e38\u590d\u6742，\u53ef\u4ee5\u7b80\u5316sql\u8bed\u53e5
\n（2）\u5b89\u5168
\n\u6709\u4e9b\u4fdd\u5bc6\u5b57\u6bb5，\u53ef\u4ee5\u901a\u8fc7\u521b\u5efa\u89c6\u56fe\u9650\u5236\u7528\u6237\u5bf9\u67d0\u4e9b\u5b57\u6bb5\u8fdb\u884c\u64cd\u4f5c
\n（3&#xff0<\/p>\n","protected":false},"author":2,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[114,100,305],"topic":[],"class_list":["post-103336","post","type-post","status-publish","format-standard","hentry","category-server","tag-mysql","tag-100","tag-305"],"yoast_head":"\nmysql\u89c6\u56fe\u548c\u4e09\u8868 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3<\/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:\/\/www.wsisp.com\/helps\/103336.html\" \/>\n<meta property=\"og:locale\" content=\"zh_CN\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"mysql\u89c6\u56fe\u548c\u4e09\u8868 - \u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\" \/>\n<meta property=\"og:description\" content=\"\u4e00\u3001\u89c6\u56fe\u7684\u4ecb\u7ecd 1\u3001\u5b9a\u4e49：\u89c6\u56fe\u662f\u4e00\u4e2a\u865a\u62df\u8868 \u5b83\u4e0d\u5728\u6570\u636e\u5e93\u4e2d\u4ee5\u5b58\u50a8\u7684\u5f62\u5f0f\u4fdd\u5b58，（\u672c\u8eab\u4e0d\u5305\u542b\u6570\u636e），\u662f\u5728\u4f7f\u7528\u89c6\u56fe\u7684\u65f6\u5019\u52a8\u6001\u751f\u6210\u3002 2\u3001\u89c6\u56fe\u7684\u4f18\u70b9？ （1）\u63d0\u9ad8\u67e5\u8be2\u6548\u7387 \u6570\u636e\u5e93\u4e2d\u7684\u6570\u636e\u67e5\u8be2\u975e\u5e38\u590d\u6742，\u53ef\u4ee5\u7b80\u5316sql\u8bed\u53e5 （2）\u5b89\u5168 \u6709\u4e9b\u4fdd\u5bc6\u5b57\u6bb5，\u53ef\u4ee5\u901a\u8fc7\u521b\u5efa\u89c6\u56fe\u9650\u5236\u7528\u6237\u5bf9\u67d0\u4e9b\u5b57\u6bb5\u8fdb\u884c\u64cd\u4f5c （3&#xff0\" \/>\n<meta property=\"og:url\" content=\"https:\/\/www.wsisp.com\/helps\/103336.html\" \/>\n<meta property=\"og:site_name\" content=\"\u7f51\u7855\u4e92\u8054\u5e2e\u52a9\u4e2d\u5fc3\" \/>\n<meta property=\"article:published_time\" content=\"2026-09-10T02:09:03+00:00\" \/>\n<meta name=\"author\" content=\"admin\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"\u4f5c\u8005\" \/>\n\t<meta name=\"twitter:data1\" content=\"admin\" \/>\n\t<meta name=\"twitter:label2\" content=\"\u9884\u8ba1\u9605\u8bfb\u65f6\u95f4\" \/>\n\t<meta name=\"twitter:data2\" content=\"3 \u5206\" \/>\n<script type=\"application\/ld+json\" class=\"yoast-schema-graph\">{\"@context\":\"https:\/\/schema.org\",\"@graph\":[{\"@type\":\"WebPage\",\"@id\":\"https:\/\/www.wsisp.com\/helps\/103336.html\",\"url\":\"https:\/\/www.wsisp.com\/helps\/103336.html\",\"name\":\"mysql\u89c6\u56fe\u548c\u4e09\u8868 - 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