{"id":187920,"date":"2024-11-11T18:17:16","date_gmt":"2024-11-11T10:17:16","guid":{"rendered":"https:\/\/server.hk\/cnblog\/187920\/"},"modified":"2024-11-11T18:17:18","modified_gmt":"2024-11-11T10:17:18","slug":"%e6%95%b8%e6%93%9a%e5%ba%ab%e7%b5%84%e5%90%88%e4%b8%bb%e9%8d%b5%e7%9a%84%e8%a8%ad%e7%bd%ae%e6%96%b9%e6%b3%95-%e6%95%b8%e6%93%9a%e5%ba%ab%e6%80%8e%e9%ba%bc%e8%a8%ad%e7%bd%ae%e7%b5%84%e5%90%88%e4%b8%bb","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/187920\/","title":{"rendered":"\u6578\u64da\u5eab\u7d44\u5408\u4e3b\u9375\u7684\u8a2d\u7f6e\u65b9\u6cd5 (\u6578\u64da\u5eab\u600e\u9ebc\u8a2d\u7f6e\u7d44\u5408\u4e3b\u9375)"},"content":{"rendered":"<h1 id=\"%e6%95%b8%e6%93%9a%e5%ba%ab%e7%b5%84%e5%90%88%e4%b8%bb%e9%8d%b5%e7%9a%84%e8%a8%ad%e7%bd%ae%e6%96%b9%e6%b3%95-%e6%95%b8%e6%93%9a%e5%ba%ab%e6%80%8e%e9%ba%bc%e8%a8%ad%e7%bd%ae%e7%b5%84%e5%90%88%e4%b8%bb-UyNrVVKhrw\">\u6578\u64da\u5eab\u7d44\u5408\u4e3b\u9375\u7684\u8a2d\u7f6e\u65b9\u6cd5 (\u6578\u64da\u5eab\u600e\u9ebc\u8a2d\u7f6e\u7d44\u5408\u4e3b\u9375)<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u8a2d\u8a08\u4e2d\uff0c\u4e3b\u9375\u662f\u7528\u4f86\u552f\u4e00\u6a19\u8b58\u6bcf\u4e00\u689d\u8a18\u9304\u7684\u91cd\u8981\u5143\u7d20\u3002\u7576\u4e00\u500b\u8868\u7684\u4e3b\u9375\u7531\u591a\u500b\u5217\u7d44\u6210\u6642\uff0c\u6211\u5011\u7a31\u4e4b\u70ba\u7d44\u5408\u4e3b\u9375\u3002\u7d44\u5408\u4e3b\u9375\u7684\u8a2d\u7f6e\u53ef\u4ee5\u6709\u6548\u5730\u89e3\u6c7a\u67d0\u4e9b\u6578\u64da\u5eab\u8a2d\u8a08\u4e2d\u7684\u554f\u984c\uff0c\u7279\u5225\u662f\u5728\u8655\u7406\u591a\u5c0d\u591a\u95dc\u4fc2\u6642\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5982\u4f55\u8a2d\u7f6e\u7d44\u5408\u4e3b\u9375\u53ca\u5176\u5728\u6578\u64da\u5eab\u4e2d\u7684\u61c9\u7528\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%af%e7%b5%84%e5%90%88%e4%b8%bb%e9%8d%b5%ef%bc%9f-UyNrVVKhrw\">\u4ec0\u9ebc\u662f\u7d44\u5408\u4e3b\u9375\uff1f<\/h2>\n<p>\u7d44\u5408\u4e3b\u9375\u662f\u7531\u5169\u500b\u6216\u591a\u500b\u5217\u7d44\u6210\u7684\u4e3b\u9375\uff0c\u9019\u4e9b\u5217\u7684\u7d44\u5408\u80fd\u5920\u552f\u4e00\u6a19\u8b58\u8868\u4e2d\u7684\u6bcf\u4e00\u689d\u8a18\u9304\u3002\u8207\u55ae\u4e00\u4e3b\u9375\u4e0d\u540c\uff0c\u7d44\u5408\u4e3b\u9375\u7684\u4f7f\u7528\u53ef\u4ee5\u5728\u4e00\u500b\u8868\u4e2d\u5b58\u5132\u66f4\u591a\u7684\u6578\u64da\uff0c\u4e26\u4e14\u80fd\u5920\u66f4\u597d\u5730\u53cd\u6620\u6578\u64da\u4e4b\u9593\u7684\u95dc\u4fc2\u3002<\/p>\n<h2 id=\"%e8%a8%ad%e7%bd%ae%e7%b5%84%e5%90%88%e4%b8%bb%e9%8d%b5%e7%9a%84%e6%ad%a5%e9%a9%9f-UyNrVVKhrw\">\u8a2d\u7f6e\u7d44\u5408\u4e3b\u9375\u7684\u6b65\u9a5f<\/h2>\n<p>\u8a2d\u7f6e\u7d44\u5408\u4e3b\u9375\u7684\u904e\u7a0b\u901a\u5e38\u5305\u62ec\u4ee5\u4e0b\u5e7e\u500b\u6b65\u9a5f\uff1a<\/p>\n<h3 id=\"1-%e7%a2%ba%e5%ae%9a%e9%9c%80%e8%a6%81%e7%9a%84%e5%88%97-UyNrVVKhrw\">1. \u78ba\u5b9a\u9700\u8981\u7684\u5217<\/h3>\n<p>\u9996\u5148\uff0c\u60a8\u9700\u8981\u78ba\u5b9a\u54ea\u4e9b\u5217\u5c07\u7d44\u6210\u7d44\u5408\u4e3b\u9375\u3002\u9019\u4e9b\u5217\u61c9\u8a72\u80fd\u5920\u552f\u4e00\u6a19\u8b58\u6bcf\u4e00\u689d\u8a18\u9304\u3002\u4f8b\u5982\uff0c\u5728\u4e00\u500b\u5b78\u751f\u9078\u8ab2\u7684\u6578\u64da\u8868\u4e2d\uff0c\u60a8\u53ef\u80fd\u6703\u9078\u64c7\u201c\u5b78\u751fID\u201d\u548c\u201c\u8ab2\u7a0bID\u201d\u4f5c\u70ba\u7d44\u5408\u4e3b\u9375\uff0c\u56e0\u70ba\u540c\u4e00\u5b78\u751f\u53ef\u4ee5\u9078\u64c7\u591a\u9580\u8ab2\u7a0b\uff0c\u800c\u540c\u4e00\u8ab2\u7a0b\u4e5f\u53ef\u4ee5\u88ab\u591a\u500b\u5b78\u751f\u9078\u64c7\u3002<\/p>\n<h3 id=\"2-%e5%89%b5%e5%bb%ba%e8%a1%a8%e6%99%82%e8%a8%ad%e7%bd%ae%e7%b5%84%e5%90%88%e4%b8%bb%e9%8d%b5-UyNrVVKhrw\">2. \u5275\u5efa\u8868\u6642\u8a2d\u7f6e\u7d44\u5408\u4e3b\u9375<\/h3>\n<p>\u5728\u5275\u5efa\u8868\u6642\uff0c\u53ef\u4ee5\u4f7f\u7528 SQL \u8a9e\u53e5\u4f86\u8a2d\u7f6e\u7d44\u5408\u4e3b\u9375\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u793a\u4f8b\uff1a<\/p>\n<pre><code>CREATE TABLE StudentCourse (\n    StudentID INT,\n    CourseID INT,\n    PRIMARY KEY (StudentID, CourseID)\n);<\/code><\/pre>\n<p>\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c`StudentID` \u548c `CourseID` \u5171\u540c\u69cb\u6210\u4e86\u7d44\u5408\u4e3b\u9375\uff0c\u78ba\u4fdd\u6bcf\u500b\u5b78\u751f\u5728\u6bcf\u9580\u8ab2\u7a0b\u4e2d\u53ea\u6709\u4e00\u689d\u8a18\u9304\u3002<\/p>\n<h3 id=\"3-%e5%9c%a8%e5%b7%b2%e6%9c%89%e8%a1%a8%e4%b8%ad%e6%b7%bb%e5%8a%a0%e7%b5%84%e5%90%88%e4%b8%bb%e9%8d%b5-UyNrVVKhrw\">3. \u5728\u5df2\u6709\u8868\u4e2d\u6dfb\u52a0\u7d44\u5408\u4e3b\u9375<\/h3>\n<p>\u5982\u679c\u60a8\u5df2\u7d93\u6709\u4e00\u500b\u8868\u4e26\u5e0c\u671b\u6dfb\u52a0\u7d44\u5408\u4e3b\u9375\uff0c\u53ef\u4ee5\u4f7f\u7528 ALTER TABLE \u8a9e\u53e5\u3002\u4ee5\u4e0b\u662f\u793a\u4f8b\uff1a<\/p>\n<pre><code>ALTER TABLE StudentCourse\nADD PRIMARY KEY (StudentID, CourseID);<\/code><\/pre>\n<p>\u9019\u6a23\u5c31\u53ef\u4ee5\u5c07\u7d44\u5408\u4e3b\u9375\u6dfb\u52a0\u5230\u5df2\u5b58\u5728\u7684\u8868\u4e2d\u3002<\/p>\n<h2 id=\"%e7%b5%84%e5%90%88%e4%b8%bb%e9%8d%b5%e7%9a%84%e5%84%aa%e7%bc%ba%e9%bb%9e-UyNrVVKhrw\">\u7d44\u5408\u4e3b\u9375\u7684\u512a\u7f3a\u9ede<\/h2>\n<h3 id=\"%e5%84%aa%e9%bb%9e-UyNrVVKhrw\">\u512a\u9ede<\/h3>\n<ul>\n<li><strong>\u552f\u4e00\u6027\uff1a<\/strong>\u7d44\u5408\u4e3b\u9375\u80fd\u5920\u78ba\u4fdd\u6bcf\u689d\u8a18\u9304\u7684\u552f\u4e00\u6027\uff0c\u907f\u514d\u91cd\u8907\u6578\u64da\u3002<\/li>\n<li><strong>\u6578\u64da\u5b8c\u6574\u6027\uff1a<\/strong>\u901a\u904e\u7d44\u5408\u4e3b\u9375\uff0c\u53ef\u4ee5\u66f4\u597d\u5730\u7dad\u8b77\u6578\u64da\u4e4b\u9593\u7684\u95dc\u4fc2\uff0c\u589e\u5f37\u6578\u64da\u7684\u5b8c\u6574\u6027\u3002<\/li>\n<\/ul>\n<h3 id=\"%e7%bc%ba%e9%bb%9e-UyNrVVKhrw\">\u7f3a\u9ede<\/h3>\n<ul>\n<li><strong>\u8907\u96dc\u6027\uff1a<\/strong>\u7d44\u5408\u4e3b\u9375\u7684\u4f7f\u7528\u53ef\u80fd\u6703\u589e\u52a0\u67e5\u8a62\u7684\u8907\u96dc\u6027\uff0c\u7279\u5225\u662f\u5728\u6d89\u53ca\u591a\u500b\u8868\u7684\u806f\u63a5\u6642\u3002<\/li>\n<li><strong>\u6027\u80fd\u554f\u984c\uff1a<\/strong>\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0c\u4f7f\u7528\u7d44\u5408\u4e3b\u9375\u53ef\u80fd\u6703\u5f71\u97ff\u67e5\u8a62\u6027\u80fd\uff0c\u7279\u5225\u662f\u7576\u7d44\u5408\u9375\u7684\u5217\u6578\u8f03\u591a\u6642\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b5%90%e8%ab%96-UyNrVVKhrw\">\u7d50\u8ad6<\/h2>\n<p>\u7d44\u5408\u4e3b\u9375\u5728\u6578\u64da\u5eab\u8a2d\u8a08\u4e2d\u662f\u4e00\u500b\u91cd\u8981\u7684\u6982\u5ff5\uff0c\u80fd\u5920\u6709\u6548\u5730\u89e3\u6c7a\u591a\u5c0d\u591a\u95dc\u4fc2\u7684\u554f\u984c\u3002\u901a\u904e\u6b63\u78ba\u5730\u8a2d\u7f6e\u7d44\u5408\u4e3b\u9375\uff0c\u53ef\u4ee5\u63d0\u9ad8\u6578\u64da\u7684\u5b8c\u6574\u6027\u548c\u552f\u4e00\u6027\u3002\u5728\u8a2d\u8a08\u6578\u64da\u5eab\u6642\uff0c\u958b\u767c\u8005\u61c9\u6839\u64da\u5177\u9ad4\u9700\u6c42\u4f86\u9078\u64c7\u662f\u5426\u4f7f\u7528\u7d44\u5408\u4e3b\u9375\uff0c\u4e26\u8003\u616e\u5176\u512a\u7f3a\u9ede\u3002<\/p>\n<p>\u5982\u9700\u4e86\u89e3\u66f4\u591a\u95dc\u65bc\u6578\u64da\u5eab\u8a2d\u8a08\u548c\u7ba1\u7406\u7684\u8cc7\u8a0a\uff0c\u60a8\u53ef\u4ee5\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9\uff0c\u7372\u53d6\u66f4\u591a\u8cc7\u6e90\u548c\u652f\u6301\u3002\u7121\u8ad6\u662f <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u9084\u662f\u5176\u4ed6\u670d\u52d9\uff0c\u6211\u5011\u90fd\u80fd\u63d0\u4f9b\u5c08\u696d\u7684\u89e3\u6c7a\u65b9\u6848\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3\u5982\u4f55\u5728\u6578\u64da\u5eab\u4e2d\u8a2d\u7f6e\u7d44\u5408\u4e3b\u9375\uff0c\u78ba\u4fdd\u6578\u64da\u7684\u552f\u4e00\u6027\u548c\u5b8c\u6574\u6027\uff0c\u63d0\u5347\u6578\u64da\u7ba1\u7406\u6548\u7387\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-187920","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/187920","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=187920"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/187920\/revisions"}],"predecessor-version":[{"id":187921,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/187920\/revisions\/187921"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=187920"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=187920"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=187920"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}