{"id":64350,"date":"2024-10-14T11:18:42","date_gmt":"2024-10-14T03:18:42","guid":{"rendered":"https:\/\/server.hk\/cnblog\/64350\/"},"modified":"2024-10-14T11:18:42","modified_gmt":"2024-10-14T03:18:42","slug":"ms-sql%ef%bc%9a%e5%90%88%e4%bd%b5%e5%85%a9%e5%80%8b%e5%ad%90%e6%9f%a5%e8%a9%a2%e7%9a%84%e7%b0%a1%e6%98%93%e6%96%b9%e6%b3%95%ef%bc%88mssql%e5%85%a9%e5%80%8b%e5%ad%90%e6%9f%a5%e8%a9%a2%e5%90%88%e4%bd%b5","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/64350\/","title":{"rendered":"MS SQL\uff1a\u5408\u4f75\u5169\u500b\u5b50\u67e5\u8a62\u7684\u7c21\u6613\u65b9\u6cd5\uff08mssql\u5169\u500b\u5b50\u67e5\u8a62\u5408\u4f75\uff09"},"content":{"rendered":"

MS SQL\uff1a\u5408\u4f75\u5169\u500b\u5b50\u67e5\u8a62\u7684\u7c21\u6613\u65b9\u6cd5<\/h1>\n

\u5728\u4f7f\u7528 Microsoft SQL Server (MS SQL) \u9032\u884c\u6578\u64da\u67e5\u8a62\u6642\uff0c\u5b50\u67e5\u8a62\u662f\u4e00\u500b\u975e\u5e38\u6709\u7528\u7684\u5de5\u5177\u3002\u5b83\u5011\u53ef\u4ee5\u5e6b\u52a9\u6211\u5011\u5f9e\u4e00\u500b\u67e5\u8a62\u4e2d\u7372\u53d6\u6578\u64da\uff0c\u7136\u5f8c\u5c07\u9019\u4e9b\u6578\u64da\u7528\u65bc\u53e6\u4e00\u500b\u67e5\u8a62\u4e2d\u3002\u7136\u800c\uff0c\u7576\u9700\u8981\u5408\u4f75\u5169\u500b\u5b50\u67e5\u8a62\u7684\u7d50\u679c\u6642\uff0c\u8a31\u591a\u958b\u767c\u8005\u53ef\u80fd\u6703\u611f\u5230\u56f0\u60d1\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5982\u4f55\u7c21\u55ae\u5730\u5408\u4f75\u5169\u500b\u5b50\u67e5\u8a62\uff0c\u4e26\u63d0\u4f9b\u4e00\u4e9b\u5be6\u7528\u7684\u7bc4\u4f8b\u3002<\/p>\n

\u4ec0\u9ebc\u662f\u5b50\u67e5\u8a62\uff1f<\/h2>\n

\u5b50\u67e5\u8a62\u662f\u5d4c\u5957\u5728\u5176\u4ed6\u67e5\u8a62\u4e2d\u7684\u67e5\u8a62\u3002\u5b83\u53ef\u4ee5\u51fa\u73fe\u5728 SELECT\u3001INSERT\u3001UPDATE \u6216 DELETE \u8a9e\u53e5\u4e2d\u3002\u5b50\u67e5\u8a62\u7684\u4e3b\u8981\u4f5c\u7528\u662f\u5f9e\u6578\u64da\u5eab\u4e2d\u6aa2\u7d22\u6578\u64da\uff0c\u4e26\u5c07\u5176\u7528\u65bc\u4e3b\u67e5\u8a62\u7684\u689d\u4ef6\u4e2d\u3002\u5b50\u67e5\u8a62\u53ef\u4ee5\u8fd4\u56de\u55ae\u4e00\u503c\u3001\u884c\u6216\u591a\u884c\u6578\u64da\u3002<\/p>\n

\u5408\u4f75\u5b50\u67e5\u8a62\u7684\u57fa\u672c\u65b9\u6cd5<\/h2>\n

\u5408\u4f75\u5169\u500b\u5b50\u67e5\u8a62\u7684\u5e38\u898b\u65b9\u6cd5\u662f\u4f7f\u7528 UNION<\/code> \u6216 JOIN<\/code>\u3002\u9019\u5169\u7a2e\u65b9\u6cd5\u5404\u6709\u5176\u9069\u7528\u7684\u5834\u666f\uff0c\u4e0b\u9762\u5c07\u8a73\u7d30\u4ecb\u7d39\u3002<\/p>\n

\u4f7f\u7528 UNION \u5408\u4f75\u5b50\u67e5\u8a62<\/h3>\n

UNION<\/code> \u7528\u65bc\u5408\u4f75\u5169\u500b\u6216\u591a\u500b SELECT \u8a9e\u53e5\u7684\u7d50\u679c\u96c6\u3002\u9019\u4e9b SELECT \u8a9e\u53e5\u5fc5\u9808\u5177\u6709\u76f8\u540c\u7684\u5217\u6578\u548c\u76f8\u4f3c\u7684\u6578\u64da\u985e\u578b\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u7c21\u55ae\u7684\u7bc4\u4f8b\uff1a<\/p>\n

SELECT name, age FROM Employees WHERE department = 'Sales'\nUNION\nSELECT name, age FROM Employees WHERE department = 'Marketing';<\/code><\/pre>\n
\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c\u6211\u5011\u5f9e\u5169\u500b\u4e0d\u540c\u7684\u90e8\u9580\u4e2d\u9078\u64c7\u54e1\u5de5\u7684\u59d3\u540d\u548c\u5e74\u9f61\uff0c\u4e26\u5c07\u7d50\u679c\u5408\u4f75\u5728\u4e00\u8d77\u3002\u9700\u8981\u6ce8\u610f\u7684\u662f\uff0cUNION<\/code> \u6703\u81ea\u52d5\u53bb\u9664\u91cd\u8907\u7684\u884c\u3002\u5982\u679c\u5e0c\u671b\u4fdd\u7559\u91cd\u8907\u7684\u884c\uff0c\u53ef\u4ee5\u4f7f\u7528 UNION ALL<\/code>\u3002<\/p>\n
\u4f7f\u7528 JOIN \u5408\u4f75\u5b50\u67e5\u8a62<\/h3>\n
\u5982\u679c\u9700\u8981\u6839\u64da\u67d0\u500b\u5171\u540c\u7684\u5217\u4f86\u5408\u4f75\u5169\u500b\u5b50\u67e5\u8a62\u7684\u7d50\u679c\uff0c\u53ef\u4ee5\u4f7f\u7528 JOIN<\/code>\u3002\u9019\u7a2e\u65b9\u6cd5\u5141\u8a31\u6211\u5011\u6839\u64da\u7279\u5b9a\u7684\u689d\u4ef6\u5c07\u5169\u500b\u67e5\u8a62\u7684\u7d50\u679c\u96c6\u9023\u63a5\u5728\u4e00\u8d77\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u4f7f\u7528 JOIN<\/code> \u7684\u7bc4\u4f8b\uff1a<\/p>\n
SELECT e.name, e.age, d.department_name\nFROM Employees e\nJOIN Departments d ON e.department_id = d.id\nWHERE d.department_name IN ('Sales', 'Marketing');<\/code><\/pre>\n
\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c\u6211\u5011\u5f9e\u54e1\u5de5\u8868\u548c\u90e8\u9580\u8868\u4e2d\u9078\u64c7\u54e1\u5de5\u7684\u59d3\u540d\u3001\u5e74\u9f61\u548c\u90e8\u9580\u540d\u7a31\uff0c\u4e26\u6839\u64da\u90e8\u9580 ID \u9032\u884c\u9023\u63a5\u3002\u9019\u6a23\u53ef\u4ee5\u7372\u5f97\u66f4\u8a73\u7d30\u7684\u6578\u64da\u3002<\/p>\n
\u9078\u64c7\u5408\u9069\u7684\u65b9\u6cd5<\/h2>\n
\u9078\u64c7\u4f7f\u7528 UNION<\/code> \u9084\u662f JOIN<\/code> \u53d6\u6c7a\u65bc\u5177\u9ad4\u7684\u9700\u6c42\u3002\u5982\u679c\u53ea\u662f\u60f3\u5408\u4f75\u5169\u500b\u7d50\u679c\u96c6\uff0c\u4e26\u4e14\u4e0d\u9700\u8981\u6839\u64da\u67d0\u500b\u5171\u540c\u7684\u5217\u9032\u884c\u95dc\u806f\uff0c\u5247 UNION<\/code> \u662f\u66f4\u7c21\u55ae\u7684\u9078\u64c7\u3002\u800c\u5982\u679c\u9700\u8981\u6839\u64da\u67d0\u4e9b\u689d\u4ef6\u4f86\u95dc\u806f\u6578\u64da\uff0c\u5247\u61c9\u4f7f\u7528 JOIN<\/code>\u3002<\/p>\n
\u7e3d\u7d50<\/h2>\n
\u5408\u4f75\u5169\u500b\u5b50\u67e5\u8a62\u5728 MS SQL \u4e2d\u662f\u4e00\u500b\u5e38\u898b\u7684\u9700\u6c42\uff0c\u7121\u8ad6\u662f\u4f7f\u7528 UNION<\/code> \u9084\u662f JOIN<\/code>\uff0c\u90fd\u80fd\u6709\u6548\u5730\u9054\u6210\u76ee\u7684\u3002\u4e86\u89e3\u9019\u4e9b\u57fa\u672c\u7684\u67e5\u8a62\u6280\u5de7\uff0c\u80fd\u5920\u5e6b\u52a9\u958b\u767c\u8005\u66f4\u9ad8\u6548\u5730\u8655\u7406\u6578\u64da\u67e5\u8a62\u3002<\/p>\n
\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684 \u9999\u6e2fVPS<\/a> \u89e3\u6c7a\u65b9\u6848\uff0cServer.HK \u63d0\u4f9b\u591a\u7a2e\u9078\u64c7\uff0c\u6eff\u8db3\u60a8\u7684\u9700\u6c42\u3002\u7121\u8ad6\u662f \u4e91\u670d\u52a1\u5668<\/a> \u9084\u662f \u9999\u6e2f\u670d\u52a1\u5668<\/a>\uff0c\u6211\u5011\u90fd\u80fd\u70ba\u60a8\u63d0\u4f9b\u7a69\u5b9a\u7684\u670d\u52d9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u63a2\u7d22MS SQL\u4e2d\u5408\u4f75\u5169\u500b\u5b50\u67e5\u8a62\u7684\u7c21\u6613\u65b9\u6cd5\uff0c\u63d0\u5347\u67e5\u8a62\u6548\u7387\uff0c\u7c21\u5316\u6578\u64da\u8655\u7406\u904e\u7a0b\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-64350","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/64350","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=64350"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/64350\/revisions"}],"predecessor-version":[{"id":64351,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/64350\/revisions\/64351"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=64350"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=64350"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=64350"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}