{"id":171545,"date":"2024-11-07T03:38:19","date_gmt":"2024-11-06T19:38:19","guid":{"rendered":"https:\/\/server.hk\/cnblog\/171545\/"},"modified":"2024-11-07T03:38:20","modified_gmt":"2024-11-06T19:38:20","slug":"%e5%bc%b7%e5%8a%9b%e5%84%aa%e5%8c%96%ef%bc%9asql-server%e8%a1%a8%e9%96%93%e7%9a%84%e9%97%9c%e8%81%af%e6%9f%a5%e8%a9%a2%ef%bc%88sqlserver%e8%a1%a8%e9%97%9c%e8%81%af%ef%bc%89","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/171545\/","title":{"rendered":"\u5f37\u529b\u512a\u5316\uff1aSQL Server\u8868\u9593\u7684\u95dc\u806f\u67e5\u8a62\uff08sqlserver\u8868\u95dc\u806f\uff09"},"content":{"rendered":"<h1 id=\"%e5%bc%b7%e5%8a%9b%e5%84%aa%e5%8c%96%ef%bc%9asql-server%e8%a1%a8%e9%96%93%e7%9a%84%e9%97%9c%e8%81%af%e6%9f%a5%e8%a9%a2%ef%bc%88sqlserver%e8%a1%a8%e9%97%9c%e8%81%af%ef%bc%89-FBxiLOFwbu\">\u5f37\u529b\u512a\u5316\uff1aSQL Server\u8868\u9593\u7684\u95dc\u806f\u67e5\u8a62\uff08sqlserver\u8868\u95dc\u806f\uff09<\/h1>\n<p>\u5728\u73fe\u4ee3\u6578\u64da\u5eab\u7ba1\u7406\u4e2d\uff0cSQL Server\u4f5c\u70ba\u4e00\u500b\u5f37\u5927\u7684\u95dc\u806f\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\uff0c\u5ee3\u6cdb\u61c9\u7528\u65bc\u5404\u7a2e\u696d\u52d9\u5834\u666f\u3002\u8868\u9593\u7684\u95dc\u806f\u67e5\u8a62\u662fSQL Server\u7684\u4e00\u500b\u91cd\u8981\u7279\u6027\uff0c\u80fd\u5920\u6709\u6548\u5730\u5f9e\u591a\u500b\u8868\u4e2d\u63d0\u53d6\u548c\u6574\u5408\u6578\u64da\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0eSQL Server\u4e2d\u8868\u9593\u7684\u95dc\u806f\u67e5\u8a62\uff0c\u4e26\u63d0\u4f9b\u4e00\u4e9b\u512a\u5316\u7684\u6280\u5de7\u548c\u793a\u4f8b\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%af%e8%a1%a8%e9%96%93%e7%9a%84%e9%97%9c%e8%81%af%e6%9f%a5%e8%a9%a2%ef%bc%9f-FBxiLOFwbu\">\u4ec0\u9ebc\u662f\u8868\u9593\u7684\u95dc\u806f\u67e5\u8a62\uff1f<\/h2>\n<p>\u8868\u9593\u7684\u95dc\u806f\u67e5\u8a62\u662f\u6307\u5728SQL\u67e5\u8a62\u4e2d\uff0c\u901a\u904e\u95dc\u806f\u4e0d\u540c\u7684\u8868\u4f86\u7372\u53d6\u6240\u9700\u6578\u64da\u7684\u904e\u7a0b\u3002\u9019\u901a\u5e38\u6d89\u53ca\u5230\u4f7f\u7528JOIN\u8a9e\u53e5\u4f86\u9023\u63a5\u5169\u500b\u6216\u591a\u500b\u8868\u3002SQL Server\u652f\u6301\u591a\u7a2eJOIN\u985e\u578b\uff0c\u5305\u62ecINNER JOIN\u3001LEFT JOIN\u3001RIGHT JOIN\u548cFULL OUTER JOIN\u7b49\u3002<\/p>\n<h3 id=\"join%e9%a1%9e%e5%9e%8b%e7%9a%84%e4%bb%8b%e7%b4%b9-FBxiLOFwbu\">JOIN\u985e\u578b\u7684\u4ecb\u7d39<\/h3>\n<ul>\n<li><strong>INNER JOIN<\/strong>\uff1a\u53ea\u8fd4\u56de\u5169\u500b\u8868\u4e2d\u5339\u914d\u7684\u884c\u3002<\/li>\n<li><strong>LEFT JOIN<\/strong>\uff1a\u8fd4\u56de\u5de6\u8868\u7684\u6240\u6709\u884c\uff0c\u5373\u4f7f\u53f3\u8868\u4e2d\u6c92\u6709\u5339\u914d\u7684\u884c\u3002<\/li>\n<li><strong>RIGHT JOIN<\/strong>\uff1a\u8fd4\u56de\u53f3\u8868\u7684\u6240\u6709\u884c\uff0c\u5373\u4f7f\u5de6\u8868\u4e2d\u6c92\u6709\u5339\u914d\u7684\u884c\u3002<\/li>\n<li><strong>FULL OUTER JOIN<\/strong>\uff1a\u8fd4\u56de\u5169\u500b\u8868\u4e2d\u6240\u6709\u7684\u884c\uff0c\u7121\u8ad6\u662f\u5426\u6709\u5339\u914d\u3002<\/li>\n<\/ul>\n<h2 id=\"%e9%97%9c%e8%81%af%e6%9f%a5%e8%a9%a2%e7%9a%84%e5%9f%ba%e6%9c%ac%e8%aa%9e%e6%b3%95-FBxiLOFwbu\">\u95dc\u806f\u67e5\u8a62\u7684\u57fa\u672c\u8a9e\u6cd5<\/h2>\n<p>\u4ee5\u4e0b\u662f\u4f7f\u7528INNER JOIN\u7684\u57fa\u672c\u8a9e\u6cd5\u793a\u4f8b\uff1a<\/p>\n<pre><code>SELECT a.column1, b.column2\nFROM TableA a\nINNER JOIN TableB b ON a.common_column = b.common_column;<\/code><\/pre>\n<p>\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0cTableA\u548cTableB\u662f\u5169\u500b\u8868\uff0ccommon_column\u662f\u5b83\u5011\u4e4b\u9593\u7684\u95dc\u806f\u5b57\u6bb5\u3002\u9019\u6a23\u7684\u67e5\u8a62\u5c07\u8fd4\u56de\u5169\u500b\u8868\u4e2d\u6240\u6709\u5339\u914d\u7684\u884c\u3002<\/p>\n<h2 id=\"%e5%84%aa%e5%8c%96%e9%97%9c%e8%81%af%e6%9f%a5%e8%a9%a2%e7%9a%84%e6%8a%80%e5%b7%a7-FBxiLOFwbu\">\u512a\u5316\u95dc\u806f\u67e5\u8a62\u7684\u6280\u5de7<\/h2>\n<p>\u5728\u9032\u884c\u8868\u9593\u7684\u95dc\u806f\u67e5\u8a62\u6642\uff0c\u6027\u80fd\u512a\u5316\u662f\u975e\u5e38\u91cd\u8981\u7684\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u512a\u5316\u7684\u6280\u5de7\uff1a<\/p>\n<h3 id=\"1-%e4%bd%bf%e7%94%a8%e7%b4%a2%e5%bc%95-FBxiLOFwbu\">1. \u4f7f\u7528\u7d22\u5f15<\/h3>\n<p>\u70ba\u95dc\u806f\u5b57\u6bb5\u5275\u5efa\u7d22\u5f15\u53ef\u4ee5\u986f\u8457\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\u3002\u7d22\u5f15\u80fd\u5920\u52a0\u5feb\u6578\u64da\u6aa2\u7d22\u7684\u901f\u5ea6\uff0c\u7279\u5225\u662f\u5728\u8655\u7406\u5927\u91cf\u6578\u64da\u6642\u3002<\/p>\n<h3 id=\"2-%e9%81%bf%e5%85%8dselect-FBxiLOFwbu\">2. \u907f\u514dSELECT *<\/h3>\n<p>\u5728\u67e5\u8a62\u4e2d\u907f\u514d\u4f7f\u7528SELECT *\uff0c\u800c\u662f\u660e\u78ba\u6307\u5b9a\u9700\u8981\u7684\u5217\u3002\u9019\u6a23\u53ef\u4ee5\u6e1b\u5c11\u6578\u64da\u50b3\u8f38\u7684\u5927\u5c0f\uff0c\u63d0\u9ad8\u67e5\u8a62\u6548\u7387\u3002<\/p>\n<pre><code>SELECT a.column1, b.column2\nFROM TableA a\nINNER JOIN TableB b ON a.common_column = b.common_column;<\/code><\/pre>\n<h3 id=\"3-%e4%bd%bf%e7%94%a8where%e5%ad%90%e5%8f%a5%e9%81%8e%e6%bf%be%e6%95%b8%e6%93%9a-FBxiLOFwbu\">3. \u4f7f\u7528WHERE\u5b50\u53e5\u904e\u6ffe\u6578\u64da<\/h3>\n<p>\u5728\u67e5\u8a62\u4e2d\u4f7f\u7528WHERE\u5b50\u53e5\u53ef\u4ee5\u904e\u6ffe\u4e0d\u5fc5\u8981\u7684\u6578\u64da\uff0c\u5f9e\u800c\u6e1b\u5c11\u67e5\u8a62\u7684\u8ca0\u64d4\u3002<\/p>\n<pre><code>SELECT a.column1, b.column2\nFROM TableA a\nINNER JOIN TableB b ON a.common_column = b.common_column\nWHERE a.condition_column = 'some_value';<\/code><\/pre>\n<h3 id=\"4-%e5%88%86%e6%9e%90%e6%9f%a5%e8%a9%a2%e8%a8%88%e5%8a%83-FBxiLOFwbu\">4. \u5206\u6790\u67e5\u8a62\u8a08\u5283<\/h3>\n<p>\u4f7f\u7528SQL Server\u7684\u67e5\u8a62\u8a08\u5283\u5206\u6790\u5de5\u5177\uff0c\u53ef\u4ee5\u5e6b\u52a9\u8b58\u5225\u6027\u80fd\u74f6\u9838\uff0c\u4e26\u91dd\u5c0d\u6027\u5730\u9032\u884c\u512a\u5316\u3002<\/p>\n<h2 id=\"%e7%b5%90%e8%ab%96-FBxiLOFwbu\">\u7d50\u8ad6<\/h2>\n<p>SQL Server\u7684\u8868\u9593\u95dc\u806f\u67e5\u8a62\u662f\u4e00\u500b\u5f37\u5927\u7684\u5de5\u5177\uff0c\u80fd\u5920\u5e6b\u52a9\u7528\u6236\u5f9e\u591a\u500b\u8868\u4e2d\u63d0\u53d6\u548c\u6574\u5408\u6578\u64da\u3002\u901a\u904e\u5408\u7406\u4f7f\u7528JOIN\u8a9e\u53e5\u3001\u5275\u5efa\u7d22\u5f15\u3001\u907f\u514d\u4e0d\u5fc5\u8981\u7684\u6578\u64da\u6aa2\u7d22\u4ee5\u53ca\u5206\u6790\u67e5\u8a62\u8a08\u5283\uff0c\u53ef\u4ee5\u986f\u8457\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u6548\u6578\u64da\u8655\u7406\u7684\u4f01\u696d\u4f86\u8aaa\uff0c\u638c\u63e1\u9019\u4e9b\u6280\u5de7\u5c07\u662f\u975e\u5e38\u6709\u76ca\u7684\u3002<\/p>\n<p>\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>\u670d\u52d9\uff0c\u9019\u5c07\u70ba\u60a8\u7684\u696d\u52d9\u63d0\u4f9b\u7a69\u5b9a\u548c\u53ef\u9760\u7684\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5f37\u529b\u512a\u5316SQL Server\u8868\u9593\u7684\u95dc\u806f\u67e5\u8a62\uff0c\u63d0\u5347\u6578\u64da\u6aa2\u7d22\u6548\u7387\uff0c\u5be6\u73fe\u9ad8\u6548\u6578\u64da\u7ba1\u7406\u8207\u5206\u6790\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-171545","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/171545","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=171545"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/171545\/revisions"}],"predecessor-version":[{"id":171546,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/171545\/revisions\/171546"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=171545"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=171545"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=171545"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}