{"id":193987,"date":"2024-11-13T02:49:18","date_gmt":"2024-11-12T18:49:18","guid":{"rendered":"https:\/\/server.hk\/cnblog\/193987\/"},"modified":"2024-11-13T02:49:20","modified_gmt":"2024-11-12T18:49:20","slug":"%e4%b8%80%e5%80%8bsql-server%e5%a4%9a%e5%b0%8d%e5%a4%9a%e6%9f%a5%e8%a9%a2%e7%9a%84%e9%9d%a2%e8%a9%a6%e9%a1%8c","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/193987\/","title":{"rendered":"\u4e00\u500bSQL Server\u591a\u5c0d\u591a\u67e5\u8a62\u7684\u9762\u8a66\u984c"},"content":{"rendered":"<h1 id=\"%e4%b8%80%e5%80%8bsql-server%e5%a4%9a%e5%b0%8d%e5%a4%9a%e6%9f%a5%e8%a9%a2%e7%9a%84%e9%9d%a2%e8%a9%a6%e9%a1%8c-iuelmXKLfR\">\u4e00\u500bSQL Server\u591a\u5c0d\u591a\u67e5\u8a62\u7684\u9762\u8a66\u984c<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u8a2d\u8a08\u4e2d\uff0c\u591a\u5c0d\u591a\u95dc\u4fc2\u662f\u4e00\u500b\u5e38\u898b\u7684\u5834\u666f\uff0c\u5c24\u5176\u662f\u5728\u6d89\u53ca\u5230\u5be6\u9ad4\u4e4b\u9593\u7684\u8907\u96dc\u95dc\u806f\u6642\u3002\u9019\u7a2e\u95dc\u4fc2\u901a\u5e38\u9700\u8981\u4e00\u500b\u4e2d\u4ecb\u8868\u4f86\u7ba1\u7406\u5169\u500b\u5be6\u9ad4\u4e4b\u9593\u7684\u95dc\u806f\u3002\u5728\u9762\u8a66\u4e2d\uff0c\u8003\u5b98\u53ef\u80fd\u6703\u554f\u5230\u5982\u4f55\u5728SQL Server\u4e2d\u5be6\u73fe\u591a\u5c0d\u591a\u67e5\u8a62\uff0c\u9019\u4e0d\u50c5\u8003\u9a57\u61c9\u8058\u8005\u7684SQL\u6280\u80fd\uff0c\u9084\u8003\u9a57\u5176\u5c0d\u6578\u64da\u5eab\u8a2d\u8a08\u7684\u7406\u89e3\u3002<\/p>\n<h2 id=\"%e5%a4%9a%e5%b0%8d%e5%a4%9a%e9%97%9c%e4%bf%82%e7%9a%84%e5%9f%ba%e6%9c%ac%e6%a6%82%e5%bf%b5-iuelmXKLfR\">\u591a\u5c0d\u591a\u95dc\u4fc2\u7684\u57fa\u672c\u6982\u5ff5<\/h2>\n<p>\u5728\u591a\u5c0d\u591a\u95dc\u4fc2\u4e2d\uff0c\u5169\u500b\u5be6\u9ad4\u4e4b\u9593\u53ef\u4ee5\u6709\u591a\u500b\u95dc\u806f\u3002\u4f8b\u5982\uff0c\u5b78\u751f\u548c\u8ab2\u7a0b\u4e4b\u9593\u7684\u95dc\u4fc2\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\u70ba\u4e86\u5be6\u73fe\u9019\u7a2e\u95dc\u4fc2\uff0c\u6211\u5011\u901a\u5e38\u6703\u5275\u5efa\u4e00\u500b\u4e2d\u4ecb\u8868\uff0c\u7a31\u70ba\u806f\u7d50\u8868\uff08junction table\uff09\uff0c\u4f86\u5b58\u5132\u9019\u4e9b\u95dc\u806f\u3002<\/p>\n<h3 id=\"%e7%a4%ba%e4%be%8b%e6%95%b8%e6%93%9a%e6%a8%a1%e5%9e%8b-iuelmXKLfR\">\u793a\u4f8b\u6578\u64da\u6a21\u578b<\/h3>\n<p>\u5047\u8a2d\u6211\u5011\u6709\u5169\u500b\u8868\uff1a<code>Students<\/code>\u548c<code>Courses<\/code>\uff0c\u4ee5\u53ca\u4e00\u500b\u806f\u7d50\u8868<code>StudentCourses<\/code>\u3002<\/p>\n<pre>\nCREATE TABLE Students (\n    StudentID INT PRIMARY KEY,\n    StudentName NVARCHAR(100)\n);\n\nCREATE TABLE Courses (\n    CourseID INT PRIMARY KEY,\n    CourseName NVARCHAR(100)\n);\n\nCREATE TABLE StudentCourses (\n    StudentID INT,\n    CourseID INT,\n    PRIMARY KEY (StudentID, CourseID),\n    FOREIGN KEY (StudentID) REFERENCES Students(StudentID),\n    FOREIGN KEY (CourseID) REFERENCES Courses(CourseID)\n);\n<\/pre>\n<h2 id=\"%e5%a4%9a%e5%b0%8d%e5%a4%9a%e6%9f%a5%e8%a9%a2%e7%9a%84%e5%af%a6%e7%8f%be-iuelmXKLfR\">\u591a\u5c0d\u591a\u67e5\u8a62\u7684\u5be6\u73fe<\/h2>\n<p>\u5728\u9762\u8a66\u4e2d\uff0c\u8003\u5b98\u53ef\u80fd\u6703\u8981\u6c42\u4f60\u64b0\u5beb\u4e00\u500b\u67e5\u8a62\uff0c\u4ee5\u7372\u53d6\u6240\u6709\u9078\u4fee\u67d0\u9580\u8ab2\u7a0b\u7684\u5b78\u751f\u540d\u55ae\u3002\u9019\u53ef\u4ee5\u901a\u904e\u806f\u7d50\u8868\u4f86\u5be6\u73fe\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u793a\u4f8b\u67e5\u8a62\uff0c\u5047\u8a2d\u6211\u5011\u60f3\u67e5\u8a62\u9078\u4fee\u8ab2\u7a0bID\u70ba1\u7684\u6240\u6709\u5b78\u751f\uff1a<\/p>\n<pre>\nSELECT s.StudentName\nFROM Students s\nJOIN StudentCourses sc ON s.StudentID = sc.StudentID\nWHERE sc.CourseID = 1;\n<\/pre>\n<p>\u9019\u500b\u67e5\u8a62\u9996\u5148\u5f9e<code>Students<\/code>\u8868\u4e2d\u9078\u64c7\u5b78\u751f\uff0c\u7136\u5f8c\u901a\u904e<code>JOIN<\/code>\u64cd\u4f5c\u8207<code>StudentCourses<\/code>\u8868\u9032\u884c\u806f\u7d50\uff0c\u6700\u5f8c\u6839\u64da\u8ab2\u7a0bID\u904e\u6ffe\u7d50\u679c\u3002<\/p>\n<h3 id=\"%e6%9f%a5%e8%a9%a2%e7%9a%84%e6%93%b4%e5%b1%95-iuelmXKLfR\">\u67e5\u8a62\u7684\u64f4\u5c55<\/h3>\n<p>\u9664\u4e86\u67e5\u8a62\u7279\u5b9a\u8ab2\u7a0b\u7684\u5b78\u751f\u5916\uff0c\u6211\u5011\u9084\u53ef\u4ee5\u64f4\u5c55\u67e5\u8a62\uff0c\u4ee5\u7372\u53d6\u6bcf\u500b\u5b78\u751f\u6240\u9078\u4fee\u7684\u6240\u6709\u8ab2\u7a0b\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u793a\u4f8b\u67e5\u8a62\uff1a<\/p>\n<pre>\nSELECT s.StudentName, c.CourseName\nFROM Students s\nJOIN StudentCourses sc ON s.StudentID = sc.StudentID\nJOIN Courses c ON sc.CourseID = c.CourseID;\n<\/pre>\n<p>\u9019\u500b\u67e5\u8a62\u5c07\u8fd4\u56de\u6bcf\u4f4d\u5b78\u751f\u53ca\u5176\u6240\u9078\u4fee\u7684\u8ab2\u7a0b\uff0c\u901a\u904e\u591a\u6b21<code>JOIN<\/code>\u64cd\u4f5c\u4f86\u5be6\u73fe\u3002<\/p>\n<h2 id=\"%e9%9d%a2%e8%a9%a6%e4%b8%ad%e7%9a%84%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-iuelmXKLfR\">\u9762\u8a66\u4e2d\u7684\u6ce8\u610f\u4e8b\u9805<\/h2>\n<p>\u5728\u9762\u8a66\u4e2d\uff0c\u9664\u4e86\u80fd\u5920\u64b0\u5beb\u6b63\u78ba\u7684\u67e5\u8a62\u5916\uff0c\u9084\u9700\u8981\u6ce8\u610f\u4ee5\u4e0b\u5e7e\u9ede\uff1a<\/p>\n<ul>\n<li>\u89e3\u91cb\u4f60\u7684\u67e5\u8a62\u908f\u8f2f\uff0c\u8b93\u8003\u5b98\u4e86\u89e3\u4f60\u7684\u601d\u8003\u904e\u7a0b\u3002<\/li>\n<li>\u8003\u616e\u6027\u80fd\u554f\u984c\uff0c\u7279\u5225\u662f\u5728\u6578\u64da\u91cf\u8f03\u5927\u7684\u60c5\u6cc1\u4e0b\uff0c\u5982\u4f55\u512a\u5316\u67e5\u8a62\u3002<\/li>\n<li>\u719f\u6089SQL Server\u7684\u7279\u6027\uff0c\u4f8b\u5982\u7d22\u5f15\u3001\u8996\u5716\u7b49\uff0c\u9019\u4e9b\u90fd\u53ef\u80fd\u5728\u9762\u8a66\u4e2d\u88ab\u63d0\u53ca\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-iuelmXKLfR\">\u7e3d\u7d50<\/h2>\n<p>\u591a\u5c0d\u591a\u67e5\u8a62\u662fSQL Server\u4e2d\u4e00\u500b\u91cd\u8981\u7684\u6982\u5ff5\uff0c\u7406\u89e3\u5176\u80cc\u5f8c\u7684\u6578\u64da\u6a21\u578b\u548c\u67e5\u8a62\u908f\u8f2f\u5c0d\u65bc\u6578\u64da\u5eab\u958b\u767c\u8005\u4f86\u8aaa\u81f3\u95dc\u91cd\u8981\u3002\u5728\u9762\u8a66\u4e2d\uff0c\u80fd\u5920\u6e05\u6670\u5730\u8868\u9054\u4f60\u7684\u601d\u8def\u548c\u89e3\u6c7a\u65b9\u6848\u5c07\u6709\u52a9\u65bc\u4f60\u5728\u7af6\u722d\u4e2d\u812b\u7a4e\u800c\u51fa\u3002\u5982\u679c\u4f60\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> \u89e3\u6c7a\u65b9\u6848\u4f86\u652f\u6301\u4f60\u7684\u6578\u64da\u5eab\u61c9\u7528\uff0cServer.HK \u63d0\u4f9b\u4e86\u591a\u7a2e\u9078\u64c7\uff0c\u6eff\u8db3\u4e0d\u540c\u9700\u6c42\u7684\u5ba2\u6236\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22SQL Server\u591a\u5c0d\u591a\u67e5\u8a62\u7684\u9762\u8a66\u984c\uff0c\u638c\u63e1\u95dc\u9375\u6982\u5ff5\u8207\u5be6\u4f5c\u6280\u5de7\uff0c\u63d0\u5347\u4f60\u7684\u9762\u8a66\u7af6\u722d\u529b\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-193987","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/193987","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=193987"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/193987\/revisions"}],"predecessor-version":[{"id":193988,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/193987\/revisions\/193988"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=193987"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=193987"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=193987"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}