{"id":76082,"date":"2024-10-16T03:42:17","date_gmt":"2024-10-15T19:42:17","guid":{"rendered":"https:\/\/server.hk\/cnblog\/76082\/"},"modified":"2024-10-16T03:42:17","modified_gmt":"2024-10-15T19:42:17","slug":"mysql%e9%8f%88%e6%8e%a5%e8%a1%a8%e7%9a%84%e7%94%a8%e6%b3%95","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/76082\/","title":{"rendered":"MySQL\u93c8\u63a5\u8868\u7684\u7528\u6cd5"},"content":{"rendered":"<h1 id=\"mysql%e9%8f%88%e6%8e%a5%e8%a1%a8%e7%9a%84%e7%94%a8%e6%b3%95-ObYiEsurUn\">MySQL\u93c8\u63a5\u8868\u7684\u7528\u6cd5<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\u4e2d\uff0cMySQL\u662f\u4e00\u500b\u5ee3\u6cdb\u4f7f\u7528\u7684\u958b\u6e90\u95dc\u806f\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\u3002\u5b83\u7684\u9748\u6d3b\u6027\u548c\u9ad8\u6548\u6027\u4f7f\u5176\u6210\u70ba\u8a31\u591a\u61c9\u7528\u7a0b\u5e8f\u7684\u9996\u9078\u3002\u93c8\u63a5\u8868\uff08Join Table\uff09\u662fMySQL\u4e2d\u4e00\u500b\u91cd\u8981\u7684\u6982\u5ff5\uff0c\u7279\u5225\u662f\u5728\u8655\u7406\u591a\u5c0d\u591a\u95dc\u4fc2\u6642\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0eMySQL\u93c8\u63a5\u8868\u7684\u7528\u6cd5\u53ca\u5176\u5be6\u73fe\u65b9\u5f0f\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%af%e9%8f%88%e6%8e%a5%e8%a1%a8%ef%bc%9f-ObYiEsurUn\">\u4ec0\u9ebc\u662f\u93c8\u63a5\u8868\uff1f<\/h2>\n<p>\u93c8\u63a5\u8868\u662f\u4e00\u7a2e\u7279\u6b8a\u7684\u6578\u64da\u8868\uff0c\u7528\u65bc\u9023\u63a5\u5169\u500b\u6216\u591a\u500b\u8868\u4e4b\u9593\u7684\u95dc\u4fc2\u3002\u5728\u95dc\u806f\u6578\u64da\u5eab\u4e2d\uff0c\u901a\u5e38\u6703\u6709\u591a\u5c0d\u591a\u7684\u95dc\u4fc2\uff0c\u4f8b\u5982\u5b78\u751f\u548c\u8ab2\u7a0b\u4e4b\u9593\u7684\u95dc\u4fc2\uff1a\u4e00\u500b\u5b78\u751f\u53ef\u4ee5\u9078\u64c7\u591a\u9580\u8ab2\u7a0b\uff0c\u800c\u4e00\u9580\u8ab2\u7a0b\u4e5f\u53ef\u4ee5\u6709\u591a\u500b\u5b78\u751f\u3002\u70ba\u4e86\u6709\u6548\u5730\u7ba1\u7406\u9019\u7a2e\u95dc\u4fc2\uff0c\u6211\u5011\u9700\u8981\u4f7f\u7528\u93c8\u63a5\u8868\u3002<\/p>\n<h2 id=\"%e9%8f%88%e6%8e%a5%e8%a1%a8%e7%9a%84%e7%b5%90%e6%a7%8b-ObYiEsurUn\">\u93c8\u63a5\u8868\u7684\u7d50\u69cb<\/h2>\n<p>\u93c8\u63a5\u8868\u901a\u5e38\u5305\u542b\u5169\u500b\u6216\u591a\u500b\u5916\u9375\uff0c\u9019\u4e9b\u5916\u9375\u6307\u5411\u5176\u4ed6\u8868\u7684\u4e3b\u9375\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u7c21\u55ae\u7684\u93c8\u63a5\u8868\u7d50\u69cb\u793a\u4f8b\uff1a<\/p>\n<pre><code>CREATE TABLE students (\n    student_id INT PRIMARY KEY,\n    name VARCHAR(100)\n);\n\nCREATE TABLE courses (\n    course_id INT PRIMARY KEY,\n    title VARCHAR(100)\n);\n\nCREATE TABLE student_courses (\n    student_id INT,\n    course_id INT,\n    PRIMARY KEY (student_id, course_id),\n    FOREIGN KEY (student_id) REFERENCES students(student_id),\n    FOREIGN KEY (course_id) REFERENCES courses(course_id)\n);\n<\/code><\/pre>\n<p>\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c`student_courses`\u8868\u4f5c\u70ba\u93c8\u63a5\u8868\uff0c\u5c07`students`\u8868\u548c`courses`\u8868\u9023\u63a5\u8d77\u4f86\u3002\u6bcf\u4e00\u884c\u90fd\u8868\u793a\u4e00\u500b\u5b78\u751f\u9078\u64c7\u4e86\u4e00\u9580\u8ab2\u7a0b\u3002<\/p>\n<h2 id=\"%e6%9f%a5%e8%a9%a2%e9%8f%88%e6%8e%a5%e8%a1%a8%e7%9a%84%e6%95%b8%e6%93%9a-ObYiEsurUn\">\u67e5\u8a62\u93c8\u63a5\u8868\u7684\u6578\u64da<\/h2>\n<p>\u4f7f\u7528\u93c8\u63a5\u8868\u5f8c\uff0c\u6211\u5011\u53ef\u4ee5\u901a\u904eJOIN\u8a9e\u53e5\u4f86\u67e5\u8a62\u76f8\u95dc\u6578\u64da\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u67e5\u8a62\u6240\u6709\u5b78\u751f\u53ca\u5176\u9078\u64c7\u7684\u8ab2\u7a0b\u7684\u793a\u4f8b\uff1a<\/p>\n<pre><code>SELECT s.name, c.title\nFROM students s\nJOIN student_courses sc ON s.student_id = sc.student_id\nJOIN courses c ON sc.course_id = c.course_id;\n<\/code><\/pre>\n<p>\u9019\u500b\u67e5\u8a62\u5c07\u8fd4\u56de\u6bcf\u500b\u5b78\u751f\u7684\u59d3\u540d\u53ca\u5176\u6240\u9078\u64c7\u7684\u8ab2\u7a0b\u6a19\u984c\u3002<\/p>\n<h2 id=\"%e9%8f%88%e6%8e%a5%e8%a1%a8%e7%9a%84%e5%84%aa%e5%8b%a2-ObYiEsurUn\">\u93c8\u63a5\u8868\u7684\u512a\u52e2<\/h2>\n<ul>\n<li><strong>\u9748\u6d3b\u6027\uff1a<\/strong>\u93c8\u63a5\u8868\u5141\u8a31\u6211\u5011\u8f15\u9b06\u5730\u7ba1\u7406\u591a\u5c0d\u591a\u7684\u95dc\u4fc2\uff0c\u4e26\u4e14\u53ef\u4ee5\u96a8\u6642\u64f4\u5c55\u3002<\/li>\n<li><strong>\u6578\u64da\u5b8c\u6574\u6027\uff1a<\/strong>\u901a\u904e\u5916\u9375\u7d04\u675f\uff0c\u93c8\u63a5\u8868\u53ef\u4ee5\u78ba\u4fdd\u6578\u64da\u7684\u4e00\u81f4\u6027\u548c\u5b8c\u6574\u6027\u3002<\/li>\n<li><strong>\u9ad8\u6548\u67e5\u8a62\uff1a<\/strong>\u4f7f\u7528JOIN\u8a9e\u53e5\u53ef\u4ee5\u5feb\u901f\u6aa2\u7d22\u76f8\u95dc\u6578\u64da\uff0c\u63d0\u5347\u67e5\u8a62\u6548\u7387\u3002<\/li>\n<\/ul>\n<h2 id=\"%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-ObYiEsurUn\">\u6ce8\u610f\u4e8b\u9805<\/h2>\n<p>\u5728\u4f7f\u7528\u93c8\u63a5\u8868\u6642\uff0c\u6709\u5e7e\u500b\u6ce8\u610f\u4e8b\u9805\u9700\u8981\u8003\u616e\uff1a<\/p>\n<ul>\n<li>\u78ba\u4fdd\u5916\u9375\u7d04\u675f\u7684\u6b63\u78ba\u6027\uff0c\u4ee5\u907f\u514d\u6578\u64da\u4e0d\u4e00\u81f4\u7684\u60c5\u6cc1\u3002<\/li>\n<li>\u5728\u8a2d\u8a08\u93c8\u63a5\u8868\u6642\uff0c\u8003\u616e\u5230\u672a\u4f86\u7684\u64f4\u5c55\u6027\uff0c\u907f\u514d\u904e\u5ea6\u8a2d\u8a08\u3002<\/li>\n<li>\u5b9a\u671f\u6aa2\u67e5\u548c\u512a\u5316\u67e5\u8a62\u6027\u80fd\uff0c\u7279\u5225\u662f\u5728\u6578\u64da\u91cf\u589e\u9577\u6642\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-ObYiEsurUn\">\u7e3d\u7d50<\/h2>\n<p>MySQL\u93c8\u63a5\u8868\u662f\u4e00\u500b\u5f37\u5927\u7684\u5de5\u5177\uff0c\u80fd\u5920\u6709\u6548\u5730\u7ba1\u7406\u591a\u5c0d\u591a\u7684\u6578\u64da\u95dc\u4fc2\u3002\u901a\u904e\u5408\u7406\u7684\u8a2d\u8a08\u548c\u4f7f\u7528\uff0c\u93c8\u63a5\u8868\u4e0d\u50c5\u80fd\u63d0\u9ad8\u6578\u64da\u7684\u5b8c\u6574\u6027\uff0c\u9084\u80fd\u63d0\u5347\u67e5\u8a62\u7684\u6548\u7387\u3002\u5c0d\u65bc\u9700\u8981\u8655\u7406\u8907\u96dc\u6578\u64da\u7d50\u69cb\u7684\u61c9\u7528\u7a0b\u5e8f\u4f86\u8aaa\uff0c\u93c8\u63a5\u8868\u662f\u4e0d\u53ef\u6216\u7f3a\u7684\u7d44\u4ef6\u3002\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684\u6578\u64da\u5eab\u89e3\u6c7a\u65b9\u6848\uff0c\u8003\u616e\u4f7f\u7528<a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a>\u4f86\u90e8\u7f72\u60a8\u7684MySQL\u6578\u64da\u5eab\uff0c\u4eab\u53d7\u7a69\u5b9a\u548c\u5feb\u901f\u7684\u6027\u80fd\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3MySQL\u93c8\u63a5\u8868\u7684\u7528\u6cd5\uff0c\u5b78\u7fd2\u5982\u4f55\u6709\u6548\u5730\u7ba1\u7406\u548c\u67e5\u8a62\u591a\u500b\u6578\u64da\u8868\u4e4b\u9593\u7684\u95dc\u806f\u3002<\/p>\n","protected":false},"author":0,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[101],"tags":[],"class_list":["post-76082","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/76082","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/types\/post"}],"replies":[{"embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/comments?post=76082"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/76082\/revisions"}],"predecessor-version":[{"id":76083,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/76082\/revisions\/76083"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=76082"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=76082"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=76082"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}