{"id":137817,"date":"2024-10-31T12:49:07","date_gmt":"2024-10-31T04:49:07","guid":{"rendered":"https:\/\/server.hk\/cnblog\/137817\/"},"modified":"2024-10-31T12:49:08","modified_gmt":"2024-10-31T04:49:08","slug":"sql-server%e9%80%a3%e6%8e%a5%e5%85%a9%e5%bc%b5%e8%a1%a8%e7%9a%84%e5%af%a6%e4%be%8b%ef%bc%9a%e5%be%9e%e9%9b%b6%e9%96%8b%e5%a7%8b%ef%bc%88sqlserver%e5%85%a9%e5%bc%b5%e8%a1%a8%ef%bc%89","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/137817\/","title":{"rendered":"SQL Server\u9023\u63a5\u5169\u5f35\u8868\u7684\u5be6\u4f8b\uff1a\u5f9e\u96f6\u958b\u59cb\uff08sqlserver\u5169\u5f35\u8868\uff09"},"content":{"rendered":"<h1 id=\"sql-server%e9%80%a3%e6%8e%a5%e5%85%a9%e5%bc%b5%e8%a1%a8%e7%9a%84%e5%af%a6%e4%be%8b%ef%bc%9a%e5%be%9e%e9%9b%b6%e9%96%8b%e5%a7%8b-buiMBftCZa\">SQL Server\u9023\u63a5\u5169\u5f35\u8868\u7684\u5be6\u4f8b\uff1a\u5f9e\u96f6\u958b\u59cb<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\u4e2d\uff0cSQL Server\u662f\u4e00\u500b\u5ee3\u6cdb\u4f7f\u7528\u7684\u95dc\u806f\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\u3002\u7576\u6211\u5011\u9700\u8981\u5f9e\u591a\u500b\u8868\u4e2d\u63d0\u53d6\u6578\u64da\u6642\uff0c\u9023\u63a5\uff08JOIN\uff09\u64cd\u4f5c\u662f\u5fc5\u4e0d\u53ef\u5c11\u7684\u3002\u672c\u6587\u5c07\u5f9e\u96f6\u958b\u59cb\u4ecb\u7d39\u5982\u4f55\u5728SQL Server\u4e2d\u9023\u63a5\u5169\u5f35\u8868\uff0c\u4e26\u63d0\u4f9b\u5be6\u969b\u7684\u793a\u4f8b\u4f86\u5e6b\u52a9\u8b80\u8005\u7406\u89e3\u9019\u4e00\u904e\u7a0b\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%af%e8%a1%a8%e9%80%a3%e6%8e%a5%ef%bc%9f-buiMBftCZa\">\u4ec0\u9ebc\u662f\u8868\u9023\u63a5\uff1f<\/h2>\n<p>\u8868\u9023\u63a5\u662f\u6307\u5728SQL\u67e5\u8a62\u4e2d\uff0c\u6839\u64da\u67d0\u4e9b\u689d\u4ef6\u5c07\u5169\u5f35\u6216\u591a\u5f35\u8868\u7684\u6578\u64da\u7d50\u5408\u5728\u4e00\u8d77\u3002\u9019\u6a23\u53ef\u4ee5\u5f9e\u4e0d\u540c\u7684\u8868\u4e2d\u63d0\u53d6\u76f8\u95dc\u7684\u4fe1\u606f\uff0c\u5f62\u6210\u4e00\u500b\u66f4\u5b8c\u6574\u7684\u6578\u64da\u96c6\u3002SQL Server\u652f\u6301\u591a\u7a2e\u9023\u63a5\u985e\u578b\uff0c\u5305\u62ec\u5167\u90e8\u9023\u63a5\uff08INNER JOIN\uff09\u3001\u5916\u90e8\u9023\u63a5\uff08LEFT JOIN\u3001RIGHT JOIN\uff09\u3001\u5168\u5916\u90e8\u9023\u63a5\uff08FULL JOIN\uff09\u7b49\u3002<\/p>\n<h2 id=\"%e7%a4%ba%e4%be%8b%e6%95%b8%e6%93%9a%e8%a1%a8-buiMBftCZa\">\u793a\u4f8b\u6578\u64da\u8868<\/h2>\n<p>\u70ba\u4e86\u66f4\u597d\u5730\u7406\u89e3\u8868\u9023\u63a5\uff0c\u6211\u5011\u5c07\u4f7f\u7528\u4ee5\u4e0b\u5169\u5f35\u793a\u4f8b\u8868\uff1a<\/p>\n<ul>\n<li><strong>Customers<\/strong>\uff08\u9867\u5ba2\u8868\uff09<\/li>\n<pre>\n    +----+----------+\n    | ID | Name     |\n    +----+----------+\n    | 1  | Alice    |\n    | 2  | Bob      |\n    | 3  | Charlie  |\n    +----+----------+\n    <\/pre>\n<li><strong>Orders<\/strong>\uff08\u8a02\u55ae\u8868\uff09<\/li>\n<pre>\n    +----+------------+----------+\n    | ID | CustomerID | Amount   |\n    +----+------------+----------+\n    | 1  | 1          | 100      |\n    | 2  | 1          | 150      |\n    | 3  | 2          | 200      |\n    +----+------------+----------+\n    <\/pre>\n<\/ul>\n<h2 id=\"%e5%85%a7%e9%83%a8%e9%80%a3%e6%8e%a5%ef%bc%88inner-join%ef%bc%89-buiMBftCZa\">\u5167\u90e8\u9023\u63a5\uff08INNER JOIN\uff09<\/h2>\n<p>\u5167\u90e8\u9023\u63a5\u662f\u6700\u5e38\u7528\u7684\u9023\u63a5\u985e\u578b\uff0c\u5b83\u53ea\u8fd4\u56de\u5728\u5169\u5f35\u8868\u4e2d\u90fd\u6709\u7684\u8a18\u9304\u3002\u4ee5\u4e0b\u662f\u4f7f\u7528\u5167\u90e8\u9023\u63a5\u67e5\u8a62\u9867\u5ba2\u53ca\u5176\u8a02\u55ae\u7684SQL\u8a9e\u53e5\uff1a<\/p>\n<pre><code>\nSELECT Customers.Name, Orders.Amount\nFROM Customers\nINNER JOIN Orders ON Customers.ID = Orders.CustomerID;\n<\/code><\/pre>\n<p>\u57f7\u884c\u4e0a\u8ff0\u67e5\u8a62\u5f8c\uff0c\u7d50\u679c\u5c07\u986f\u793a\u6240\u6709\u6709\u8a02\u55ae\u7684\u9867\u5ba2\u53ca\u5176\u8a02\u55ae\u91d1\u984d\uff1a<\/p>\n<pre>\n+-------+--------+\n| Name  | Amount |\n+-------+--------+\n| Alice | 100    |\n| Alice | 150    |\n| Bob   | 200    |\n+-------+--------+\n<\/pre>\n<h2 id=\"%e5%b7%a6%e5%a4%96%e9%83%a8%e9%80%a3%e6%8e%a5%ef%bc%88left-join%ef%bc%89-buiMBftCZa\">\u5de6\u5916\u90e8\u9023\u63a5\uff08LEFT JOIN\uff09<\/h2>\n<p>\u5de6\u5916\u90e8\u9023\u63a5\u8fd4\u56de\u5de6\u8868\u4e2d\u7684\u6240\u6709\u8a18\u9304\uff0c\u5373\u4f7f\u5728\u53f3\u8868\u4e2d\u6c92\u6709\u5339\u914d\u7684\u8a18\u9304\u3002\u4ee5\u4e0b\u662f\u4f7f\u7528\u5de6\u5916\u90e8\u9023\u63a5\u67e5\u8a62\u9867\u5ba2\u53ca\u5176\u8a02\u55ae\u7684SQL\u8a9e\u53e5\uff1a<\/p>\n<pre><code>\nSELECT Customers.Name, Orders.Amount\nFROM Customers\nLEFT JOIN Orders ON Customers.ID = Orders.CustomerID;\n<\/code><\/pre>\n<p>\u57f7\u884c\u4e0a\u8ff0\u67e5\u8a62\u5f8c\uff0c\u7d50\u679c\u5c07\u986f\u793a\u6240\u6709\u9867\u5ba2\u53ca\u5176\u8a02\u55ae\u91d1\u984d\uff0c\u5373\u4f7f\u67d0\u4e9b\u9867\u5ba2\u6c92\u6709\u8a02\u55ae\uff1a<\/p>\n<pre>\n+-------+--------+\n| Name  | Amount |\n+-------+--------+\n| Alice | 100    |\n| Alice | 150    |\n| Bob   | 200    |\n| Charlie | NULL  |\n+-------+--------+\n<\/pre>\n<h2 id=\"%e5%8f%b3%e5%a4%96%e9%83%a8%e9%80%a3%e6%8e%a5%ef%bc%88right-join%ef%bc%89-buiMBftCZa\">\u53f3\u5916\u90e8\u9023\u63a5\uff08RIGHT JOIN\uff09<\/h2>\n<p>\u53f3\u5916\u90e8\u9023\u63a5\u8fd4\u56de\u53f3\u8868\u4e2d\u7684\u6240\u6709\u8a18\u9304\uff0c\u5373\u4f7f\u5728\u5de6\u8868\u4e2d\u6c92\u6709\u5339\u914d\u7684\u8a18\u9304\u3002\u4ee5\u4e0b\u662f\u4f7f\u7528\u53f3\u5916\u90e8\u9023\u63a5\u67e5\u8a62\u9867\u5ba2\u53ca\u5176\u8a02\u55ae\u7684SQL\u8a9e\u53e5\uff1a<\/p>\n<pre><code>\nSELECT Customers.Name, Orders.Amount\nFROM Customers\nRIGHT JOIN Orders ON Customers.ID = Orders.CustomerID;\n<\/code><\/pre>\n<p>\u7531\u65bc\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c\u6240\u6709\u8a02\u55ae\u90fd\u6709\u5c0d\u61c9\u7684\u9867\u5ba2\uff0c\u56e0\u6b64\u7d50\u679c\u8207\u5167\u90e8\u9023\u63a5\u76f8\u540c\u3002<\/p>\n<h2 id=\"%e7%b8%bd%e7%b5%90-buiMBftCZa\">\u7e3d\u7d50<\/h2>\n<p>\u5728\u672c\u6587\u4e2d\uff0c\u6211\u5011\u4ecb\u7d39\u4e86\u5982\u4f55\u5728SQL Server\u4e2d\u9023\u63a5\u5169\u5f35\u8868\uff0c\u4e26\u901a\u904e\u5be6\u969b\u7684\u793a\u4f8b\u5c55\u793a\u4e86\u5167\u90e8\u9023\u63a5\u548c\u5916\u90e8\u9023\u63a5\u7684\u7528\u6cd5\u3002\u9019\u4e9b\u57fa\u672c\u7684SQL\u67e5\u8a62\u6280\u5de7\u5c0d\u65bc\u6578\u64da\u5206\u6790\u548c\u5831\u544a\u751f\u6210\u81f3\u95dc\u91cd\u8981\u3002\u7121\u8ad6\u60a8\u662f\u6578\u64da\u5eab\u7ba1\u7406\u54e1\u9084\u662f\u958b\u767c\u4eba\u54e1\uff0c\u638c\u63e1\u9019\u4e9b\u6280\u80fd\u90fd\u80fd\u5e6b\u52a9\u60a8\u66f4\u6709\u6548\u5730\u8655\u7406\u6578\u64da\u3002<\/p>\n<p>\u5982\u679c\u60a8\u9700\u8981\u9ad8\u6548\u7684\u6578\u64da\u5eab\u89e3\u6c7a\u65b9\u6848\uff0c\u8003\u616e\u4f7f\u7528<a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a>\u6216<a href=\"https:\/\/server.hk\">\u4e91\u670d\u52a1\u5668<\/a>\u4f86\u652f\u6301\u60a8\u7684\u696d\u52d9\u9700\u6c42\u3002\u7121\u8ad6\u662f\u6578\u64da\u5b58\u5132\u9084\u662f\u61c9\u7528\u7a0b\u5e8f\u6258\u7ba1\uff0c\u9078\u64c7\u5408\u9069\u7684<a href=\"https:\/\/server.hk\">\u670d\u52a1\u5668<\/a>\u5c07\u70ba\u60a8\u7684\u9805\u76ee\u63d0\u4f9b\u7a69\u5b9a\u7684\u57fa\u790e\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5b78\u7fd2\u5982\u4f55\u5728SQL 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