{"id":186596,"date":"2024-11-11T07:14:18","date_gmt":"2024-11-10T23:14:18","guid":{"rendered":"https:\/\/server.hk\/cnblog\/186596\/"},"modified":"2024-11-11T07:14:19","modified_gmt":"2024-11-10T23:14:19","slug":"%e6%95%b8%e6%93%9a%e5%ba%ab%e9%97%9c%e4%bf%82%e6%a8%a1%e5%9e%8b%e7%b0%a1%e4%bb%8b%ef%bc%9a%e4%b8%a6%e4%ba%a4%e8%a1%a8%e9%97%9c%e4%bf%82-%e6%95%b8%e6%93%9a%e5%ba%ab%e4%b8%a6-%e4%ba%a4%e8%a1%a8","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/186596\/","title":{"rendered":"\u6578\u64da\u5eab\u95dc\u4fc2\u6a21\u578b\u7c21\u4ecb\uff1a\u4e26\u4ea4\u8868\u95dc\u4fc2 (\u6578\u64da\u5eab\u4e26 \u4ea4\u8868\u95dc\u4fc2)"},"content":{"rendered":"<h1 id=\"%e6%95%b8%e6%93%9a%e5%ba%ab%e9%97%9c%e4%bf%82%e6%a8%a1%e5%9e%8b%e7%b0%a1%e4%bb%8b%ef%bc%9a%e4%b8%a6%e4%ba%a4%e8%a1%a8%e9%97%9c%e4%bf%82-%e6%95%b8%e6%93%9a%e5%ba%ab%e4%b8%a6%e4%ba%a4%e8%a1%a8%e9%97%9c-feJsLRtCoQ\">\u6578\u64da\u5eab\u95dc\u4fc2\u6a21\u578b\u7c21\u4ecb\uff1a\u4e26\u4ea4\u8868\u95dc\u4fc2 (\u6578\u64da\u5eab\u4e26\u4ea4\u8868\u95dc\u4fc2)<\/h1>\n<p>\u5728\u7576\u4eca\u7684\u6578\u64da\u9a45\u52d5\u6642\u4ee3\uff0c\u6578\u64da\u5eab\u7684\u8a2d\u8a08\u548c\u7ba1\u7406\u8b8a\u5f97\u8d8a\u4f86\u8d8a\u91cd\u8981\u3002\u95dc\u4fc2\u6578\u64da\u5eab\u6a21\u578b\u662f\u6700\u5e38\u898b\u7684\u6578\u64da\u5eab\u8a2d\u8a08\u65b9\u6cd5\u4e4b\u4e00\uff0c\u5176\u4e2d\u7684\u4e26\u4ea4\u8868\u95dc\u4fc2\uff08Join Table Relationship\uff09\u662f\u4e00\u500b\u95dc\u9375\u6982\u5ff5\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e\u4e26\u4ea4\u8868\u95dc\u4fc2\u7684\u57fa\u672c\u6982\u5ff5\u3001\u7279\u9ede\u53ca\u5176\u5728\u6578\u64da\u5eab\u8a2d\u8a08\u4e2d\u7684\u61c9\u7528\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%af%e4%b8%a6%e4%ba%a4%e8%a1%a8%e9%97%9c%e4%bf%82%ef%bc%9f-feJsLRtCoQ\">\u4ec0\u9ebc\u662f\u4e26\u4ea4\u8868\u95dc\u4fc2\uff1f<\/h2>\n<p>\u4e26\u4ea4\u8868\u95dc\u4fc2\u662f\u6307\u5728\u95dc\u4fc2\u6578\u64da\u5eab\u4e2d\uff0c\u901a\u904e\u4e00\u500b\u4e2d\u4ecb\u8868\uff08\u4e5f\u7a31\u70ba\u806f\u63a5\u8868\u6216\u4ea4\u53c9\u8868\uff09\u4f86\u5efa\u7acb\u5169\u500b\u6216\u591a\u500b\u8868\u4e4b\u9593\u7684\u591a\u5c0d\u591a\u95dc\u4fc2\u3002\u9019\u7a2e\u8a2d\u8a08\u5141\u8a31\u6578\u64da\u5eab\u6709\u6548\u5730\u7ba1\u7406\u548c\u67e5\u8a62\u8907\u96dc\u7684\u6578\u64da\u95dc\u4fc2\u3002<\/p>\n<h3 id=\"%e5%a4%9a%e5%b0%8d%e5%a4%9a%e9%97%9c%e4%bf%82%e7%9a%84%e5%bf%85%e8%a6%81%e6%80%a7-feJsLRtCoQ\">\u591a\u5c0d\u591a\u95dc\u4fc2\u7684\u5fc5\u8981\u6027<\/h3>\n<p>\u5728\u8a31\u591a\u61c9\u7528\u5834\u666f\u4e2d\uff0c\u5be6\u9ad4\u4e4b\u9593\u7684\u95dc\u4fc2\u4e26\u4e0d\u662f\u7c21\u55ae\u7684\u4e00\u5c0d\u4e00\u6216\u4e00\u5c0d\u591a\u3002\u4f8b\u5982\uff0c\u8003\u616e\u4e00\u500b\u5b78\u751f\u548c\u8ab2\u7a0b\u7684\u4f8b\u5b50\uff1a\u4e00\u500b\u5b78\u751f\u53ef\u4ee5\u9078\u4fee\u591a\u9580\u8ab2\u7a0b\uff0c\u800c\u4e00\u9580\u8ab2\u7a0b\u4e5f\u53ef\u4ee5\u6709\u591a\u500b\u5b78\u751f\u9078\u4fee\u3002\u9019\u7a2e\u60c5\u6cc1\u4e0b\uff0c\u4f7f\u7528\u4e26\u4ea4\u8868\u95dc\u4fc2\u662f\u975e\u5e38\u5408\u9069\u7684\u3002<\/p>\n<h2 id=\"%e4%b8%a6%e4%ba%a4%e8%a1%a8%e7%9a%84%e7%b5%90%e6%a7%8b-feJsLRtCoQ\">\u4e26\u4ea4\u8868\u7684\u7d50\u69cb<\/h2>\n<p>\u4e26\u4ea4\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\u793a\u4f8b\uff0c\u5c55\u793a\u5982\u4f55\u4f7f\u7528\u4e26\u4ea4\u8868\u4f86\u8868\u793a\u5b78\u751f\u548c\u8ab2\u7a0b\u4e4b\u9593\u7684\u95dc\u4fc2\uff1a<\/p>\n<pre><code>\u5b78\u751f\u8868 (Students)\n--------------------\n| \u5b78\u751fID (StudentID) | \u59d3\u540d (Name) |\n--------------------\n| 1                  | \u5f35\u4e09        |\n| 2                  | \u674e\u56db        |\n\n\u8ab2\u7a0b\u8868 (Courses)\n--------------------\n| \u8ab2\u7a0bID (CourseID) | \u8ab2\u7a0b\u540d\u7a31 (CourseName) |\n--------------------\n| 101                | \u6578\u5b78                |\n| 102                | \u7269\u7406                |\n\n\u5b78\u751f\u8ab2\u7a0b\u8868 (StudentCourses)\n--------------------\n| \u5b78\u751fID (StudentID) | \u8ab2\u7a0bID (CourseID) |\n--------------------\n| 1                  | 101                |\n| 1                  | 102                |\n| 2                  | 101                |\n--------------------<\/code><\/pre>\n<p>\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c\u5b78\u751f\u8ab2\u7a0b\u8868\uff08StudentCourses\uff09\u4f5c\u70ba\u4e26\u4ea4\u8868\uff0c\u5c07\u5b78\u751f\u548c\u8ab2\u7a0b\u4e4b\u9593\u7684\u591a\u5c0d\u591a\u95dc\u4fc2\u9023\u63a5\u8d77\u4f86\u3002\u6bcf\u4e00\u884c\u90fd\u8868\u793a\u4e00\u500b\u5b78\u751f\u9078\u4fee\u4e86\u4e00\u9580\u8ab2\u7a0b\u3002<\/p>\n<h2 id=\"%e4%b8%a6%e4%ba%a4%e8%a1%a8%e7%9a%84%e5%84%aa%e5%8b%a2-feJsLRtCoQ\">\u4e26\u4ea4\u8868\u7684\u512a\u52e2<\/h2>\n<ul>\n<li><strong>\u9748\u6d3b\u6027\uff1a<\/strong>\u4e26\u4ea4\u8868\u5141\u8a31\u6578\u64da\u5eab\u8a2d\u8a08\u8005\u9748\u6d3b\u5730\u7ba1\u7406\u591a\u5c0d\u591a\u95dc\u4fc2\uff0c\u4e26\u80fd\u5920\u8f15\u9b06\u5730\u64f4\u5c55\u548c\u4fee\u6539\u6578\u64da\u7d50\u69cb\u3002<\/li>\n<li><strong>\u6578\u64da\u5b8c\u6574\u6027\uff1a<\/strong>\u901a\u904e\u4f7f\u7528\u5916\u9375\u7d04\u675f\uff0c\u4e26\u4ea4\u8868\u53ef\u4ee5\u5e6b\u52a9\u7dad\u8b77\u6578\u64da\u7684\u5b8c\u6574\u6027\uff0c\u9632\u6b62\u4e0d\u4e00\u81f4\u7684\u6578\u64da\u51fa\u73fe\u3002<\/li>\n<li><strong>\u67e5\u8a62\u6548\u7387\uff1a<\/strong>\u4f7f\u7528\u4e26\u4ea4\u8868\u53ef\u4ee5\u63d0\u9ad8\u67e5\u8a62\u7684\u6548\u7387\uff0c\u7279\u5225\u662f\u5728\u9700\u8981\u9032\u884c\u8907\u96dc\u67e5\u8a62\u6642\u3002<\/li>\n<\/ul>\n<h2 id=\"%e6%9f%a5%e8%a9%a2%e4%b8%a6%e4%ba%a4%e8%a1%a8%e7%9a%84%e7%a4%ba%e4%be%8b-feJsLRtCoQ\">\u67e5\u8a62\u4e26\u4ea4\u8868\u7684\u793a\u4f8b<\/h2>\n<p>\u5728\u4f7f\u7528\u4e26\u4ea4\u8868\u6642\uff0c\u67e5\u8a62\u6578\u64da\u7684\u65b9\u5f0f\u4e5f\u6703\u6709\u6240\u4e0d\u540c\u3002\u4ee5\u4e0b\u662f\u4e00\u500bSQL\u67e5\u8a62\u793a\u4f8b\uff0c\u7528\u65bc\u67e5\u8a62\u9078\u4fee\u4e86\u6578\u5b78\u8ab2\u7a0b\u7684\u6240\u6709\u5b78\u751f\uff1a<\/p>\n<pre><code>SELECT Students.Name\nFROM Students\nJOIN StudentCourses ON Students.StudentID = StudentCourses.StudentID\nJOIN Courses ON StudentCourses.CourseID = Courses.CourseID\nWHERE Courses.CourseName = '\u6578\u5b78';<\/code><\/pre>\n<p>\u9019\u500b\u67e5\u8a62\u901a\u904e\u806f\u63a5\u4e09\u500b\u8868\uff0c\u627e\u51fa\u6240\u6709\u9078\u4fee\u6578\u5b78\u8ab2\u7a0b\u7684\u5b78\u751f\u59d3\u540d\u3002<\/p>\n<h2 id=\"%e7%b5%90%e8%ab%96-feJsLRtCoQ\">\u7d50\u8ad6<\/h2>\n<p>\u4e26\u4ea4\u8868\u95dc\u4fc2\u662f\u95dc\u4fc2\u6578\u64da\u5eab\u8a2d\u8a08\u4e2d\u4e0d\u53ef\u6216\u7f3a\u7684\u4e00\u90e8\u5206\uff0c\u7279\u5225\u662f\u5728\u8655\u7406\u591a\u5c0d\u591a\u95dc\u4fc2\u6642\u3002\u901a\u904e\u5408\u7406\u5730\u4f7f\u7528\u4e26\u4ea4\u8868\uff0c\u6578\u64da\u5eab\u8a2d\u8a08\u8005\u53ef\u4ee5\u63d0\u9ad8\u6578\u64da\u7684\u9748\u6d3b\u6027\u548c\u5b8c\u6574\u6027\uff0c\u4e26\u512a\u5316\u67e5\u8a62\u6027\u80fd\u3002\u96a8\u8457\u6578\u64da\u9700\u6c42\u7684\u589e\u9577\uff0c\u7406\u89e3\u4e26\u4ea4\u8868\u95dc\u4fc2\u7684\u904b\u4f5c\u539f\u7406\u5c07\u5c0d\u6578\u64da\u5eab\u7ba1\u7406\u8005\u548c\u958b\u767c\u8005\u81f3\u95dc\u91cd\u8981\u3002<\/p>\n<p>\u5982\u9700\u4e86\u89e3\u66f4\u591a\u6709\u95dc\u6578\u64da\u5eab\u548c\u96f2\u8a08\u7b97\u7684\u8cc7\u8a0a\uff0c\u8acb\u8a2a\u554f\u6211\u5011\u7684\u7db2\u7ad9 <a href=\"https:\/\/server.hk\">Server.HK<\/a>\uff0c\u63a2\u7d22\u6211\u5011\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> \u548c <a href=\"https:\/\/server.hk\">\u9999\u6e2f\u4f3a\u670d\u5668<\/a> \u89e3\u6c7a\u65b9\u6848\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3\u6578\u64da\u5eab\u95dc\u4fc2\u6a21\u578b\u53ca\u5176\u4e26\u4ea4\u8868\u95dc\u4fc2\uff0c\u63a2\u7d22\u6578\u64da\u5982\u4f55\u6709\u6548\u7d44\u7e54\u8207\u7ba1\u7406\uff0c\u63d0\u5347\u6578\u64da\u5eab\u8a2d\u8a08\u7684\u6548\u7387\u8207\u9748\u6d3b\u6027\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-186596","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/186596","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=186596"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/186596\/revisions"}],"predecessor-version":[{"id":186597,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/186596\/revisions\/186597"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=186596"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=186596"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=186596"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}