{"id":139668,"date":"2024-10-31T19:39:19","date_gmt":"2024-10-31T11:39:19","guid":{"rendered":"https:\/\/server.hk\/cnblog\/139668\/"},"modified":"2024-10-31T19:39:20","modified_gmt":"2024-10-31T11:39:20","slug":"sql-server%e6%95%b8%e6%93%9a%e5%ba%ab%e4%b8%ad%e6%89%b9%e9%87%8f%e6%9b%bf%e6%8f%9b%e6%95%b8%e6%93%9a%e7%9a%84%e6%96%b9%e6%b3%95","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/139668\/","title":{"rendered":"SQL Server\u6578\u64da\u5eab\u4e2d\u6279\u91cf\u66ff\u63db\u6578\u64da\u7684\u65b9\u6cd5"},"content":{"rendered":"

SQL Server\u6578\u64da\u5eab\u4e2d\u6279\u91cf\u66ff\u63db\u6578\u64da\u7684\u65b9\u6cd5<\/h1>\n

\u5728\u6578\u64da\u5eab\u7ba1\u7406\u4e2d\uff0c\u6279\u91cf\u66ff\u63db\u6578\u64da\u662f\u4e00\u500b\u5e38\u898b\u7684\u9700\u6c42\u3002\u7121\u8ad6\u662f\u56e0\u70ba\u6578\u64da\u932f\u8aa4\u3001\u6578\u64da\u683c\u5f0f\u8b8a\u66f4\uff0c\u9084\u662f\u56e0\u70ba\u696d\u52d9\u9700\u6c42\u7684\u8abf\u6574\uff0c\u80fd\u5920\u6709\u6548\u5730\u9032\u884c\u6279\u91cf\u66ff\u63db\u5c07\u5927\u5927\u63d0\u9ad8\u5de5\u4f5c\u6548\u7387\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5728SQL Server\u4e2d\u9032\u884c\u6279\u91cf\u66ff\u63db\u6578\u64da\u7684\u5e7e\u7a2e\u65b9\u6cd5\uff0c\u4e26\u63d0\u4f9b\u76f8\u61c9\u7684\u793a\u4f8b\u548c\u4ee3\u78bc\u3002<\/p>\n

\u4f7f\u7528UPDATE\u8a9e\u53e5\u9032\u884c\u6279\u91cf\u66ff\u63db<\/h2>\n

\u6700\u5e38\u898b\u7684\u6279\u91cf\u66ff\u63db\u65b9\u6cd5\u662f\u4f7f\u7528SQL\u7684UPDATE\u8a9e\u53e5\u3002\u9019\u7a2e\u65b9\u6cd5\u9069\u5408\u65bc\u9700\u8981\u6839\u64da\u7279\u5b9a\u689d\u4ef6\u66f4\u65b0\u591a\u689d\u8a18\u9304\u7684\u60c5\u6cc1\u3002<\/p>\n

UPDATE \u8868\u540d\nSET \u5217\u540d = '\u65b0\u503c'\nWHERE \u689d\u4ef6;<\/code><\/pre>\n
\u4f8b\u5982\uff0c\u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b\u540d\u70ba\u201cCustomers\u201d\u7684\u8868\uff0c\u4e26\u4e14\u6211\u5011\u60f3\u8981\u5c07\u6240\u6709\u4f86\u81ea\u201c\u9999\u6e2f\u201d\u7684\u5ba2\u6236\u7684\u57ce\u5e02\u540d\u7a31\u66f4\u6539\u70ba\u201c\u9999\u6e2f\u7279\u5225\u884c\u653f\u5340\u201d\u3002\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0bSQL\u8a9e\u53e5\uff1a<\/p>\n
UPDATE Customers\nSET City = '\u9999\u6e2f\u7279\u5225\u884c\u653f\u5340'\nWHERE City = '\u9999\u6e2f';<\/code><\/pre>\n
\u4f7f\u7528CASE\u8a9e\u53e5\u9032\u884c\u689d\u4ef6\u66ff\u63db<\/h2>\n
\u5982\u679c\u9700\u8981\u6839\u64da\u4e0d\u540c\u7684\u689d\u4ef6\u9032\u884c\u4e0d\u540c\u7684\u66ff\u63db\uff0c\u53ef\u4ee5\u4f7f\u7528CASE\u8a9e\u53e5\u3002\u9019\u7a2e\u65b9\u6cd5\u5141\u8a31\u5728\u4e00\u500bUPDATE\u8a9e\u53e5\u4e2d\u9032\u884c\u591a\u500b\u689d\u4ef6\u7684\u66ff\u63db\u3002<\/p>\n
UPDATE \u8868\u540d\nSET \u5217\u540d = CASE\n    WHEN \u689d\u4ef61 THEN '\u503c1'\n    WHEN \u689d\u4ef62 THEN '\u503c2'\n    ELSE \u5217\u540d\nEND;<\/code><\/pre>\n
\u4f8b\u5982\uff0c\u5047\u8a2d\u6211\u5011\u60f3\u8981\u6839\u64da\u5ba2\u6236\u7684\u7b49\u7d1a\u4f86\u66f4\u65b0\u6298\u6263\u7387\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0bSQL\u8a9e\u53e5\uff1a<\/p>\n
UPDATE Customers\nSET Discount = CASE\n    WHEN Level = 'Gold' THEN 0.2\n    WHEN Level = 'Silver' THEN 0.1\n    ELSE 0\nEND;<\/code><\/pre>\n
\u4f7f\u7528REPLACE\u51fd\u6578\u9032\u884c\u5b57\u7b26\u4e32\u66ff\u63db<\/h2>\n
\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0c\u6211\u5011\u53ef\u80fd\u9700\u8981\u5728\u5b57\u7b26\u4e32\u4e2d\u9032\u884c\u90e8\u5206\u66ff\u63db\u3002SQL Server\u63d0\u4f9b\u4e86REPLACE\u51fd\u6578\u4f86\u5be6\u73fe\u9019\u4e00\u529f\u80fd\u3002<\/p>\n
UPDATE \u8868\u540d\nSET \u5217\u540d = REPLACE(\u5217\u540d, '\u820a\u503c', '\u65b0\u503c')\nWHERE \u689d\u4ef6;<\/code><\/pre>\n
\u4f8b\u5982\uff0c\u5982\u679c\u6211\u5011\u60f3\u8981\u5c07\u6240\u6709\u5ba2\u6236\u7684\u96fb\u5b50\u90f5\u4ef6\u5730\u5740\u4e2d\u7684\u201c@old.com\u201d\u66ff\u63db\u70ba\u201c@new.com\u201d\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0bSQL\u8a9e\u53e5\uff1a<\/p>\n
UPDATE Customers\nSET Email = REPLACE(Email, '@old.com', '@new.com');<\/code><\/pre>\n
\u4f7f\u7528\u81e8\u6642\u8868\u9032\u884c\u6279\u91cf\u66ff\u63db<\/h2>\n
\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0c\u76f4\u63a5\u5728\u539f\u59cb\u8868\u4e0a\u9032\u884c\u66f4\u65b0\u53ef\u80fd\u4e0d\u5920\u9748\u6d3b\u3002\u9019\u6642\u53ef\u4ee5\u8003\u616e\u4f7f\u7528\u81e8\u6642\u8868\u4f86\u9032\u884c\u6279\u91cf\u66ff\u63db\u3002\u9996\u5148\uff0c\u5c07\u9700\u8981\u66f4\u65b0\u7684\u6578\u64da\u63d2\u5165\u5230\u81e8\u6642\u8868\u4e2d\uff0c\u7136\u5f8c\u518d\u9032\u884c\u66f4\u65b0\u3002<\/p>\n
SELECT * INTO #TempCustomers\nFROM Customers\nWHERE \u689d\u4ef6;\n\nUPDATE Customers\nSET \u5217\u540d = '\u65b0\u503c'\nFROM Customers c\nJOIN #TempCustomers t ON c.ID = t.ID;<\/code><\/pre>\n
\u9019\u7a2e\u65b9\u6cd5\u7684\u597d\u8655\u5728\u65bc\u53ef\u4ee5\u5728\u66f4\u65b0\u4e4b\u524d\u5c0d\u6578\u64da\u9032\u884c\u6aa2\u67e5\u548c\u8655\u7406\uff0c\u5f9e\u800c\u964d\u4f4e\u932f\u8aa4\u7684\u98a8\u96aa\u3002<\/p>\n
\u7e3d\u7d50<\/h2>\n
\u5728SQL Server\u4e2d\uff0c\u6279\u91cf\u66ff\u63db\u6578\u64da\u7684\u65b9\u6cd5\u6709\u5f88\u591a\uff0c\u6839\u64da\u5177\u9ad4\u9700\u6c42\u9078\u64c7\u5408\u9069\u7684\u65b9\u6cd5\u53ef\u4ee5\u63d0\u9ad8\u6578\u64da\u8655\u7406\u7684\u6548\u7387\u3002\u7121\u8ad6\u662f\u4f7f\u7528UPDATE\u8a9e\u53e5\u3001CASE\u8a9e\u53e5\u3001REPLACE\u51fd\u6578\uff0c\u9084\u662f\u81e8\u6642\u8868\uff0c\u9019\u4e9b\u6280\u8853\u90fd\u80fd\u5e6b\u52a9\u7528\u6236\u6709\u6548\u5730\u7ba1\u7406\u548c\u66f4\u65b0\u6578\u64da\u3002<\/p>\n
\u5982\u679c\u60a8\u9700\u8981\u7a69\u5b9a\u7684\u6578\u64da\u5eab\u74b0\u5883\u4f86\u57f7\u884c\u9019\u4e9b\u64cd\u4f5c\uff0c\u8003\u616e\u4f7f\u7528\u9999\u6e2fVPS<\/a>\u6216\u9999\u6e2f\u4f3a\u670d\u5668<\/a>\u4f86\u652f\u6301\u60a8\u7684\u696d\u52d9\u9700\u6c42\u3002\u7121\u8ad6\u662f\u6578\u64da\u5eab\u7ba1\u7406\u9084\u662f\u5176\u4ed6\u61c9\u7528\uff0c\u9078\u64c7\u5408\u9069\u7684\u670d\u52d9\u5668\u5c07\u6709\u52a9\u65bc\u63d0\u5347\u6574\u9ad4\u6027\u80fd\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"
\u63a2\u7d22SQL Server\u6578\u64da\u5eab\u4e2d\u6279\u91cf\u66ff\u63db\u6578\u64da\u7684\u6709\u6548\u65b9\u6cd5\uff0c\u63d0\u5347\u6578\u64da\u7ba1\u7406\u6548\u7387\uff0c\u7c21\u5316\u6578\u64da\u66f4\u65b0\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-139668","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/139668","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=139668"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/139668\/revisions"}],"predecessor-version":[{"id":139669,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/139668\/revisions\/139669"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=139668"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=139668"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=139668"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}