{"id":319507,"date":"2024-01-21T13:02:55","date_gmt":"2024-01-21T05:02:55","guid":{"rendered":"https:\/\/www.idc.net\/help\/319507\/"},"modified":"2024-01-21T13:02:55","modified_gmt":"2024-01-21T05:02:55","slug":"%e8%a7%86%e5%9b%be%e4%b8%8a%e5%ae%9a%e4%b9%89sql-server%e8%a7%a6%e5%8f%91%e5%99%a8","status":"publish","type":"post","link":"https:\/\/idc.net\/help\/319507\/","title":{"rendered":"\u89c6\u56fe\u4e0a\u5b9a\u4e49sql server\u89e6\u53d1\u5668"},"content":{"rendered":"<p>sql server\u89e6\u53d1\u5668\u5728SQL\u6570\u636e\u5e93\u4e2d\u975e\u5e38\u91cd\u8981\uff0c\u4e0b\u9762\u5c31\u5c06\u4e3a\u60a8\u4ecb\u7ecd\u5728\u89c6\u56fe\u4e0a\u5b9a\u4e49 INSTEAD OF UPDATE \u89e6\u53d1\u5668\u7684\u65b9\u6cd5\uff0c\u5e0c\u671b\u5bf9\u60a8\u66f4\u597d\u5b66\u4e60sql server\u89e6\u53d1\u5668\u80fd\u6709\u6240\u5e2e\u52a9\u3002<\/p>\n<p>\u53ef\u5728\u89c6\u56fe\u4e0a\u5b9a\u4e49 INSTEAD OF UPDATE \u89e6\u53d1\u5668\u4ee5\u4ee3\u66ff UPDATE \u8bed\u53e5\u7684\u6807\u51c6\u64cd\u4f5c\u3002\u901a\u5e38\uff0c\u5728\u89c6\u56fe\u4e0a\u5b9a\u4e49 INSTEAD OF UPDATE \u89e6\u53d1\u5668\u4ee5\u4fbf\u4fee\u6539\u4e00\u4e2a\u6216\u591a\u4e2a\u57fa\u8868\u4e2d\u7684\u6570\u636e\u3002<\/p>\n<p>\u5f15\u7528\u5e26\u6709 INSTEAD OF UPDATE \u89e6\u53d1\u5668\u7684\u89c6\u56fe\u7684 UPDATE \u8bed\u53e5\u5fc5\u987b\u4e3a SET \u5b50\u53e5\u4e2d\u5f15\u7528\u7684\u6240\u6709\u4e0d\u53ef\u4e3a\u7a7a\u7684\u89c6\u56fe\u5217\u63d0\u4f9b\u503c\u3002\u8be5\u64cd\u4f5c\u5305\u62ec\u5728\u57fa\u8868\u4e2d\u5f15\u7528\u5217\u7684\u89c6\u56fe\u5217\uff08\u8be5\u57fa\u8868\u4e0d\u80fd\u6307\u5b9a\u8f93\u5165\u503c\uff09\uff0c\u5982\uff1a<\/p>\n<p>\u25c6\u57fa\u8868\u4e2d\u7684\u8ba1\u7b97\u5217\u3002<\/p>\n<p>\u25c6IDENTITY INSERT \u8bbe\u7f6e\u4e3a OFF \u7684\u57fa\u8868\u4e2d\u7684\u6807\u8bc6\u5217\u3002<\/p>\n<p>\u25c6\u5177\u6709 timestamp \u6570\u636e\u7c7b\u578b\u7684\u57fa\u8868\u5217\u3002<\/p>\n<p>\u901a\u5e38\uff0c\u5f53\u5f15\u7528\u8868\u7684 UPDATE \u8bed\u53e5\u8bd5\u56fe\u8bbe\u7f6e\u8ba1\u7b97\u5217\u3001\u6807\u8bc6\u5217\u6216 timestamp \u5217\u7684\u503c\u65f6\u4f1a\u4ea7\u751f\u9519\u8bef\u4fe1\u606f\uff0c\u56e0\u4e3a\u8fd9\u4e9b\u5217\u7684\u503c\u5fc5\u987b\u7531 Microsoft\u00ae SQL Server\u2122 \u51b3\u5b9a\u3002\u8fd9\u4e9b\u5217\u5fc5\u987b\u5305\u542b\u5728 UPDATE \u8bed\u53e5\u4e2d\uff0c\u4ee5\u4fbf\u6ee1\u8db3\u8be5\u884c\u7684 NOT NULL \u9700\u8981\u3002\u7136\u800c\uff0c\u5982\u679c UPDATE \u8bed\u53e5\u5f15\u7528\u5e26 INSTEAD OF UPDATE \u89e6\u53d1\u5668\u7684\u89c6\u56fe\uff0c\u8be5\u89c6\u56fe\u4e2d\u5b9a\u4e49\u7684\u903b\u8f91\u80fd\u591f\u56de\u907f\u8fd9\u4e9b\u5217\u5e76\u907f\u514d\u9519\u8bef\u3002\u4e3a\u6b64\uff0cINSTEAD OF UPDATE \u89e6\u53d1\u5668\u5fc5\u987b\u4e0d\u8bd5\u56fe\u66f4\u65b0\u57fa\u8868\u4e2d\u76f8\u5e94\u5217\u7684\u503c\u3002\u901a\u8fc7\u4e0d\u5c06\u8fd9\u4e9b\u5217\u5305\u542b\u5728 UPDATE \u8bed\u53e5\u7684 SET \u5b50\u53e5\u4e2d\u5373\u53ef\u8fbe\u5230\u6b64\u76ee\u7684\u3002\u5728 inserted \u8868\u4e2d\u5904\u7406\u8bb0\u5f55\u65f6\uff0c\u8ba1\u7b97\u5217\u3001\u6807\u8bc6\u5217\u6216 timestamp \u5217\u53ef\u4ee5\u5305\u542b\u865a\u503c\u4ee5\u6ee1\u8db3 NOT NULL \u5217\u7684\u9700\u8981\uff0c\u4f46\u662f INSTEAD OF UPDATE \u89e6\u53d1\u5668\u5ffd\u7565\u8fd9\u4e9b\u5217\u503c\u5e76\u4e14\u7531 SQL Server \u8bbe\u7f6e\u6b63\u786e\u7684\u503c\u3002<\/p>\n<p>\u7531\u4e8e INSTEAD OF UPDATE \u89e6\u53d1\u5668\u4e0d\u5fc5\u5728\u672a\u66f4\u65b0\u7684 inserted \u5217\u4e2d\u5904\u7406\u6570\u636e\uff0c\u56e0\u6b64\u8be5\u89e3\u51b3\u65b9\u6cd5\u8d77\u4f5c\u7528\u3002\u5728\u4f20\u9012\u5230 INSTEAD OF UPDATE \u89e6\u53d1\u5668\u7684 inserted \u8868\u4e2d\uff0cSET \u5b50\u53e5\u4e2d\u6307\u5b9a\u7684\u5217\u9075\u4ece\u4e0e INSTEAD OF INSERT \u89e6\u53d1\u5668\u4e2d\u7684 inserted \u5217\u76f8\u540c\u7684\u89c4\u5219\u3002\u5bf9\u4e8e\u5728 SET \u5b50\u53e5\u4e2d\u672a\u6307\u5b9a\u7684\u5217\uff0cinserted \u8868\u5305\u542b\u5728\u53d1\u51fa UPDATE \u8bed\u53e5\u524d\u5df2\u5b58\u5728\u7684\u503c\u3002sql server\u89e6\u53d1\u5668\u53ef\u4ee5\u901a\u8fc7\u4f7f\u7528 IF UPDATED(column) \u5b50\u53e5\u6765\u6d4b\u8bd5\u7279\u5b9a\u7684\u5217\u662f\u5426\u5df2\u66f4\u65b0\u3002<\/p>\n<p>INSTEAD OF UPDATE \u89e6\u53d1\u5668\u4ec5\u5e94\u5728 WHERE \u5b50\u53e5\u641c\u7d22\u6761\u4ef6\u4e2d\u4f7f\u7528\u4e3a\u8ba1\u7b97\u5217\u3001\u6807\u8bc6\u5217\u6216 timestamp \u5217\u63d0\u4f9b\u7684\u503c\u3002<\/p>\n<p>\u89c6\u56fe\u4e0a\u7684 INSTEAD OF UPDATE \u89e6\u53d1\u5668\u5e94\u8be5\u7528\u6765\u5904\u7406\u4e3a\u8ba1\u7b97\u5217\u3001\u6807\u8bc6\u5217\u3001timestamp \u5217\u6216\u9ed8\u8ba4\u5217\u63d0\u4f9b\u7684\u66f4\u65b0\u503c\u7684\u903b\u8f91\u4e0e\u5e94\u7528\u4e8e\u8fd9\u4e9b\u5217\u7c7b\u578b\u7684\u63d2\u5165\u503c\u7684\u903b\u8f91\u76f8\u540c\u3002<\/p>\n<p>\u8bf4\u660e\uff1a \u5728\u542b\u6709\u7528 UPDATE \u64cd\u4f5c\u5b9a\u4e49\u7684\u5916\u952e\u7684\u8868\u4e0a\uff0c\u4e0d\u80fd\u5b9a\u4e49 INSTEAD OF UPDATE \u89e6\u53d1\u5668\u3002<\/p>\n<p>&nbsp;<\/p>\n<p>&nbsp;<\/p>\n<p>\u3010\u7f16\u8f91\u63a8\u8350\u3011<\/p>\n<p>sql server\u5b57\u7b26\u4e32\u7684\u7c7b\u578b<\/p>\n<p>sql server\u5b57\u7b26\u4e32\u622a\u53d6\u5b9e\u4f8b\u5206\u6790<\/p>\n<p>sql server\u5b57\u7b26\u4e32\u51fd\u6570\u5206\u7c7b\u8be6\u89e3<\/p>\n<p>sql server\u5b57\u7b26\u4e32\u4e32\u8054\u8fd0\u7b97\u7b26\u793a\u4f8b<\/p>\n<p>sql server\u7aef\u53e3\u7684\u66f4\u6539\u65b9\u6cd5<\/p>\n<p>&nbsp;<\/p>\n","protected":false},"excerpt":{"rendered":"<p>sql server\u89e6\u53d1\u5668\u5728SQL\u6570\u636e\u5e93\u4e2d\u975e\u5e38\u91cd\u8981\uff0c\u4e0b\u9762\u5c31\u5c06\u4e3a\u60a8\u4ecb\u7ecd\u5728\u89c6\u56fe\u4e0a\u5b9a\u4e49 INSTEAD OF UPD [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7038],"tags":[],"class_list":["post-319507","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts\/319507","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/comments?post=319507"}],"version-history":[{"count":0,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/posts\/319507\/revisions"}],"wp:attachment":[{"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/media?parent=319507"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/categories?post=319507"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/idc.net\/help\/wp-json\/wp\/v2\/tags?post=319507"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}