{"id":138515,"date":"2024-10-31T15:07:22","date_gmt":"2024-10-31T07:07:22","guid":{"rendered":"https:\/\/server.hk\/cnblog\/138515\/"},"modified":"2024-10-31T15:07:23","modified_gmt":"2024-10-31T07:07:23","slug":"sql-server%e6%89%93%e9%96%8b%e6%b8%b8%e6%a8%99%e6%a6%82%e8%bf%b0","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/138515\/","title":{"rendered":"SQL Server\u6253\u958b\u6e38\u6a19\u6982\u8ff0"},"content":{"rendered":"<h1 id=\"sql-server%e6%89%93%e9%96%8b%e6%b8%b8%e6%a8%99%e6%a6%82%e8%bf%b0-exhdgYzmLF\">SQL Server\u6253\u958b\u6e38\u6a19\u6982\u8ff0<\/h1>\n<p>\u5728SQL Server\u4e2d\uff0c\u6e38\u6a19\u662f\u4e00\u7a2e\u7528\u65bc\u9010\u884c\u8655\u7406\u67e5\u8a62\u7d50\u679c\u96c6\u7684\u6578\u64da\u7d50\u69cb\u3002\u96d6\u7136SQL Server\u63d0\u4f9b\u4e86\u5f37\u5927\u7684\u96c6\u6210\u67e5\u8a62\u529f\u80fd\uff0c\u4f46\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0c\u4f7f\u7528\u6e38\u6a19\u53ef\u4ee5\u66f4\u9748\u6d3b\u5730\u64cd\u4f5c\u6578\u64da\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0eSQL Server\u4e2d\u7684\u6e38\u6a19\uff0c\u5305\u62ec\u5176\u985e\u578b\u3001\u4f7f\u7528\u60c5\u5883\u4ee5\u53ca\u5982\u4f55\u6709\u6548\u5730\u7ba1\u7406\u6e38\u6a19\u3002<\/p>\n<h2 id=\"%e6%b8%b8%e6%a8%99%e7%9a%84%e9%a1%9e%e5%9e%8b-exhdgYzmLF\">\u6e38\u6a19\u7684\u985e\u578b<\/h2>\n<p>SQL Server\u4e2d\u7684\u6e38\u6a19\u4e3b\u8981\u5206\u70ba\u4ee5\u4e0b\u5e7e\u7a2e\u985e\u578b\uff1a<\/p>\n<ul>\n<li><strong>\u975c\u614b\u6e38\u6a19\uff08Static Cursor\uff09<\/strong>\uff1a\u9019\u7a2e\u6e38\u6a19\u5728\u6253\u958b\u6642\u6703\u751f\u6210\u4e00\u500b\u975c\u614b\u7684\u7d50\u679c\u96c6\uff0c\u4e26\u4e14\u4e0d\u6703\u96a8\u8457\u57fa\u790e\u6578\u64da\u7684\u8b8a\u5316\u800c\u66f4\u65b0\u3002\u9069\u5408\u65bc\u9700\u8981\u591a\u6b21\u8a2a\u554f\u76f8\u540c\u6578\u64da\u7684\u60c5\u6cc1\u3002<\/li>\n<li><strong>\u52d5\u614b\u6e38\u6a19\uff08Dynamic Cursor\uff09<\/strong>\uff1a\u52d5\u614b\u6e38\u6a19\u6703\u96a8\u8457\u57fa\u790e\u6578\u64da\u7684\u8b8a\u5316\u800c\u5373\u6642\u66f4\u65b0\uff0c\u9019\u610f\u5473\u8457\u5728\u6e38\u6a19\u6253\u958b\u5f8c\uff0c\u4efb\u4f55\u5c0d\u57fa\u790e\u6578\u64da\u7684\u66f4\u6539\u90fd\u6703\u53cd\u6620\u5728\u6e38\u6a19\u4e2d\u3002<\/li>\n<li><strong>\u5feb\u7167\u6e38\u6a19\uff08Snapshot Cursor\uff09<\/strong>\uff1a\u9019\u7a2e\u6e38\u6a19\u5728\u6253\u958b\u6642\u6703\u6355\u7372\u7576\u524d\u7684\u6578\u64da\u5feb\u7167\uff0c\u4e26\u5728\u6e38\u6a19\u7684\u751f\u547d\u9031\u671f\u5167\u4fdd\u6301\u4e0d\u8b8a\u3002\u9019\u5c0d\u65bc\u9700\u8981\u5728\u4e00\u6bb5\u6642\u9593\u5167\u4fdd\u6301\u6578\u64da\u4e00\u81f4\u6027\u7684\u60c5\u6cc1\u975e\u5e38\u6709\u7528\u3002<\/li>\n<li><strong>\u524d\u5411\u6e38\u6a19\uff08Forward-Only Cursor\uff09<\/strong>\uff1a\u9019\u7a2e\u6e38\u6a19\u53ea\u80fd\u5411\u524d\u79fb\u52d5\uff0c\u7121\u6cd5\u56de\u5230\u4e4b\u524d\u7684\u884c\u3002\u5b83\u7684\u6027\u80fd\u8f03\u597d\uff0c\u9069\u5408\u65bc\u53ea\u9700\u9010\u884c\u8655\u7406\u7684\u60c5\u6cc1\u3002<\/li>\n<\/ul>\n<h2 id=\"%e4%bd%bf%e7%94%a8%e6%b8%b8%e6%a8%99%e7%9a%84%e6%83%85%e5%a2%83-exhdgYzmLF\">\u4f7f\u7528\u6e38\u6a19\u7684\u60c5\u5883<\/h2>\n<p>\u96d6\u7136SQL Server\u7684\u96c6\u6210\u67e5\u8a62\u529f\u80fd\u53ef\u4ee5\u8655\u7406\u5927\u591a\u6578\u6578\u64da\u64cd\u4f5c\uff0c\u4f46\u5728\u67d0\u4e9b\u7279\u5b9a\u60c5\u5883\u4e0b\uff0c\u4f7f\u7528\u6e38\u6a19\u6703\u66f4\u70ba\u5408\u9069\uff1a<\/p>\n<ul>\n<li><strong>\u9700\u8981\u9010\u884c\u8655\u7406\u6578\u64da<\/strong>\uff1a\u7576\u9700\u8981\u5c0d\u67e5\u8a62\u7d50\u679c\u96c6\u4e2d\u7684\u6bcf\u4e00\u884c\u9032\u884c\u8907\u96dc\u7684\u8a08\u7b97\u6216\u64cd\u4f5c\u6642\uff0c\u6e38\u6a19\u63d0\u4f9b\u4e86\u4e00\u7a2e\u7c21\u55ae\u7684\u65b9\u5f0f\u4f86\u9010\u884c\u8a2a\u554f\u6578\u64da\u3002<\/li>\n<li><strong>\u9700\u8981\u5728\u5faa\u74b0\u4e2d\u57f7\u884c\u64cd\u4f5c<\/strong>\uff1a\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0c\u53ef\u80fd\u9700\u8981\u5728\u5faa\u74b0\u4e2d\u57f7\u884c\u591a\u6b21\u64cd\u4f5c\uff0c\u9019\u6642\u6e38\u6a19\u53ef\u4ee5\u5e6b\u52a9\u7c21\u5316\u908f\u8f2f\u3002<\/li>\n<li><strong>\u9700\u8981\u4fdd\u6301\u6578\u64da\u4e00\u81f4\u6027<\/strong>\uff1a\u5728\u67d0\u4e9b\u696d\u52d9\u908f\u8f2f\u4e2d\uff0c\u53ef\u80fd\u9700\u8981\u5728\u8655\u7406\u6578\u64da\u6642\u4fdd\u6301\u6578\u64da\u7684\u4e00\u81f4\u6027\uff0c\u9019\u6642\u5feb\u7167\u6e38\u6a19\u6703\u975e\u5e38\u6709\u7528\u3002<\/li>\n<\/ul>\n<h2 id=\"%e5%a6%82%e4%bd%95%e6%89%93%e9%96%8b%e5%92%8c%e4%bd%bf%e7%94%a8%e6%b8%b8%e6%a8%99-exhdgYzmLF\">\u5982\u4f55\u6253\u958b\u548c\u4f7f\u7528\u6e38\u6a19<\/h2>\n<p>\u5728SQL Server\u4e2d\uff0c\u4f7f\u7528\u6e38\u6a19\u7684\u57fa\u672c\u6b65\u9a5f\u5982\u4e0b\uff1a<\/p>\n<pre><code>DECLARE cursor_name CURSOR FOR\nSELECT column1, column2 FROM table_name WHERE condition;\n\nOPEN cursor_name;\n\nFETCH NEXT FROM cursor_name INTO @variable1, @variable2;\n\nWHILE @@FETCH_STATUS = 0\nBEGIN\n    -- \u5728\u9019\u88e1\u57f7\u884c\u9700\u8981\u7684\u64cd\u4f5c\n    FETCH NEXT FROM cursor_name INTO @variable1, @variable2;\nEND\n\nCLOSE cursor_name;\nDEALLOCATE cursor_name;<\/code><\/pre>\n<p>\u4e0a\u8ff0\u4ee3\u78bc\u7247\u6bb5\u5c55\u793a\u4e86\u5982\u4f55\u8072\u660e\u3001\u6253\u958b\u3001\u7372\u53d6\u6578\u64da\u4ee5\u53ca\u95dc\u9589\u548c\u91cb\u653e\u6e38\u6a19\u3002\u4f7f\u7528\u6e38\u6a19\u6642\uff0c\u61c9\u6ce8\u610f\u91cb\u653e\u8cc7\u6e90\uff0c\u4ee5\u907f\u514d\u6f5b\u5728\u7684\u6027\u80fd\u554f\u984c\u3002<\/p>\n<h2 id=\"%e6%b8%b8%e6%a8%99%e7%9a%84%e6%80%a7%e8%83%bd%e8%80%83%e9%87%8f-exhdgYzmLF\">\u6e38\u6a19\u7684\u6027\u80fd\u8003\u91cf<\/h2>\n<p>\u96d6\u7136\u6e38\u6a19\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\u975e\u5e38\u6709\u7528\uff0c\u4f46\u5b83\u5011\u4e5f\u53ef\u80fd\u5c0e\u81f4\u6027\u80fd\u554f\u984c\u3002\u6e38\u6a19\u7684\u4f7f\u7528\u901a\u5e38\u6bd4\u96c6\u6210\u67e5\u8a62\u8981\u6162\uff0c\u56e0\u70ba\u5b83\u5011\u9700\u8981\u9010\u884c\u8655\u7406\u6578\u64da\u3002\u56e0\u6b64\uff0c\u5728\u4f7f\u7528\u6e38\u6a19\u4e4b\u524d\uff0c\u61c9\u8003\u616e\u4ee5\u4e0b\u5e7e\u9ede\uff1a<\/p>\n<ul>\n<li>\u76e1\u91cf\u4f7f\u7528\u96c6\u6210\u67e5\u8a62\u4f86\u66ff\u4ee3\u6e38\u6a19\uff0c\u7279\u5225\u662f\u5728\u8655\u7406\u5927\u91cf\u6578\u64da\u6642\u3002<\/li>\n<li>\u5982\u679c\u5fc5\u9808\u4f7f\u7528\u6e38\u6a19\uff0c\u8acb\u9078\u64c7\u5408\u9069\u7684\u6e38\u6a19\u985e\u578b\uff0c\u4ee5\u6700\u5c0f\u5316\u6027\u80fd\u5f71\u97ff\u3002<\/li>\n<li>\u78ba\u4fdd\u5728\u4f7f\u7528\u5b8c\u6e38\u6a19\u5f8c\u53ca\u6642\u95dc\u9589\u548c\u91cb\u653e\u8cc7\u6e90\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-exhdgYzmLF\">\u7e3d\u7d50<\/h2>\n<p>SQL Server\u4e2d\u7684\u6e38\u6a19\u662f\u4e00\u7a2e\u5f37\u5927\u7684\u5de5\u5177\uff0c\u80fd\u5920\u5728\u7279\u5b9a\u60c5\u6cc1\u4e0b\u63d0\u4f9b\u9748\u6d3b\u7684\u6578\u64da\u8655\u7406\u80fd\u529b\u3002\u96d6\u7136\u5b83\u5011\u5728\u6027\u80fd\u4e0a\u53ef\u80fd\u4e0d\u5982\u96c6\u6210\u67e5\u8a62\uff0c\u4f46\u5728\u9700\u8981\u9010\u884c\u8655\u7406\u6216\u4fdd\u6301\u6578\u64da\u4e00\u81f4\u6027\u7684\u60c5\u6cc1\u4e0b\uff0c\u6e38\u6a19\u4ecd\u7136\u662f\u4e0d\u53ef\u6216\u7f3a\u7684\u3002\u4e86\u89e3\u6e38\u6a19\u7684\u985e\u578b\u53ca\u5176\u4f7f\u7528\u60c5\u5883\uff0c\u80fd\u5920\u5e6b\u52a9\u958b\u767c\u8005\u66f4\u6709\u6548\u5730\u7ba1\u7406\u6578\u64da\u64cd\u4f5c\u3002<\/p>\n<p>\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> \u89e3\u6c7a\u65b9\u6848\uff0cServer.HK \u63d0\u4f9b\u591a\u7a2e\u9078\u64c7\uff0c\u9069\u5408\u5404\u7a2e\u9700\u6c42\u3002\u7121\u8ad6\u662f <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u9084\u662f\u5176\u4ed6 <a href=\"https:\/\/server.hk\">\u4e91\u670d\u52a1\u5668<\/a> \u670d\u52d9\uff0c\u6211\u5011\u90fd\u80fd\u70ba\u60a8\u63d0\u4f9b\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3SQL Server\u4e2d\u6e38\u6a19\u7684\u57fa\u672c\u6982\u5ff5\u3001\u4f7f\u7528\u65b9\u6cd5\u53ca\u5176\u5728\u6578\u64da\u64cd\u4f5c\u4e2d\u7684\u61c9\u7528\uff0c\u63d0\u5347\u6578\u64da\u8655\u7406\u6548\u7387\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-138515","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/138515","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=138515"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/138515\/revisions"}],"predecessor-version":[{"id":138516,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/138515\/revisions\/138516"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=138515"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=138515"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=138515"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}