{"id":66289,"date":"2024-10-14T16:10:19","date_gmt":"2024-10-14T08:10:19","guid":{"rendered":"https:\/\/server.hk\/cnblog\/66289\/"},"modified":"2024-10-14T16:10:20","modified_gmt":"2024-10-14T08:10:20","slug":"mssql%e6%b8%b8%e6%a8%99%e7%9a%84%e6%ad%a3%e7%a2%ba%e4%bd%bf%e7%94%a8%e6%8c%87%e5%8d%97%ef%bc%88mssql%e6%b8%b8%e6%a8%99%e4%bd%bf%e7%94%a8%e6%96%b9%e6%b3%95%ef%bc%89","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/66289\/","title":{"rendered":"MSSQL\u6e38\u6a19\u7684\u6b63\u78ba\u4f7f\u7528\u6307\u5357\uff08mssql\u6e38\u6a19\u4f7f\u7528\u65b9\u6cd5\uff09"},"content":{"rendered":"<h1 id=\"mssql%e6%b8%b8%e6%a8%99%e7%9a%84%e6%ad%a3%e7%a2%ba%e4%bd%bf%e7%94%a8%e6%8c%87%e5%8d%97%ef%bc%88mssql%e6%b8%b8%e6%a8%99%e4%bd%bf%e7%94%a8%e6%96%b9%e6%b3%95%ef%bc%89-SEQMrfqrFj\">MSSQL\u6e38\u6a19\u7684\u6b63\u78ba\u4f7f\u7528\u6307\u5357\uff08mssql\u6e38\u6a19\u4f7f\u7528\u65b9\u6cd5\uff09<\/h1>\n<p>\u5728\u8cc7\u6599\u5eab\u7ba1\u7406\u4e2d\uff0c\u6e38\u6a19\uff08Cursor\uff09\u662f\u4e00\u7a2e\u91cd\u8981\u7684\u5de5\u5177\uff0c\u7279\u5225\u662f\u5728 Microsoft SQL Server\uff08MSSQL\uff09\u4e2d\u3002\u6e38\u6a19\u5141\u8a31\u958b\u767c\u8005\u9010\u884c\u8655\u7406\u67e5\u8a62\u7d50\u679c\uff0c\u9019\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\u662f\u975e\u5e38\u6709\u7528\u7684\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e MSSQL \u6e38\u6a19\u7684\u6b63\u78ba\u4f7f\u7528\u65b9\u6cd5\uff0c\u5305\u62ec\u5176\u5b9a\u7fa9\u3001\u985e\u578b\u3001\u4f7f\u7528\u60c5\u5883\u53ca\u7bc4\u4f8b\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%af%e6%b8%b8%e6%a8%99%ef%bc%9f-SEQMrfqrFj\">\u4ec0\u9ebc\u662f\u6e38\u6a19\uff1f<\/h2>\n<p>\u6e38\u6a19\u662f\u4e00\u7a2e\u8cc7\u6599\u5eab\u5c0d\u8c61\uff0c\u5141\u8a31\u7528\u6236\u9010\u884c\u8a2a\u554f\u67e5\u8a62\u7d50\u679c\u96c6\u3002\u8207\u4e00\u6b21\u6027\u8655\u7406\u6574\u500b\u7d50\u679c\u96c6\u4e0d\u540c\uff0c\u6e38\u6a19\u63d0\u4f9b\u4e86\u66f4\u7d30\u7dfb\u7684\u63a7\u5236\uff0c\u7279\u5225\u662f\u5728\u9700\u8981\u9010\u884c\u8655\u7406\u6578\u64da\u7684\u60c5\u6cc1\u4e0b\u3002<\/p>\n<h2 id=\"%e6%b8%b8%e6%a8%99%e7%9a%84%e9%a1%9e%e5%9e%8b-SEQMrfqrFj\">\u6e38\u6a19\u7684\u985e\u578b<\/h2>\n<p>MSSQL \u4e2d\u7684\u6e38\u6a19\u4e3b\u8981\u6709\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\u8907\u88fd\u7d50\u679c\u96c6\uff0c\u4e4b\u5f8c\u7684\u8b8a\u66f4\u4e0d\u6703\u5f71\u97ff\u5230\u6e38\u6a19\u4e2d\u7684\u6578\u64da\u3002<\/li>\n<li><strong>\u52d5\u614b\u6e38\u6a19\uff08Dynamic Cursor\uff09<\/strong>\uff1a\u9019\u7a2e\u6e38\u6a19\u6703\u53cd\u6620\u7d50\u679c\u96c6\u4e2d\u7684\u6240\u6709\u8b8a\u66f4\uff0c\u7121\u8ad6\u662f\u63d2\u5165\u3001\u66f4\u65b0\u9084\u662f\u522a\u9664\u3002<\/li>\n<li><strong>\u5feb\u7167\u6e38\u6a19\uff08Snapshot Cursor\uff09<\/strong>\uff1a\u9019\u7a2e\u6e38\u6a19\u5728\u6253\u958b\u6642\u6703\u6355\u6349\u7576\u524d\u7684\u7d50\u679c\u96c6\u5feb\u7167\uff0c\u4e26\u5728\u6e38\u6a19\u7684\u751f\u547d\u9031\u671f\u5167\u4fdd\u6301\u4e0d\u8b8a\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<\/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-SEQMrfqrFj\">\u4f7f\u7528\u6e38\u6a19\u7684\u60c5\u5883<\/h2>\n<p>\u96d6\u7136\u6e38\u6a19\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\u975e\u5e38\u6709\u7528\uff0c\u4f46\u5728\u4f7f\u7528\u6642\u61c9\u8b39\u614e\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u9069\u5408\u4f7f\u7528\u6e38\u6a19\u7684\u60c5\u5883\uff1a<\/p>\n<ul>\n<li>\u9700\u8981\u9010\u884c\u8655\u7406\u6578\u64da\u7684\u60c5\u6cc1\uff0c\u4f8b\u5982\u8a08\u7b97\u6bcf\u884c\u7684\u7e3d\u548c\u6216\u5e73\u5747\u503c\u3002<\/li>\n<li>\u9700\u8981\u5728\u8655\u7406\u904e\u7a0b\u4e2d\u9032\u884c\u8907\u96dc\u7684\u908f\u8f2f\u904b\u7b97\u3002<\/li>\n<li>\u7576\u9700\u8981\u5728\u591a\u500b\u8868\u4e4b\u9593\u9032\u884c\u9010\u884c\u6bd4\u8f03\u6642\u3002<\/li>\n<\/ul>\n<h2 id=\"%e6%b8%b8%e6%a8%99%e7%9a%84%e4%bd%bf%e7%94%a8%e6%96%b9%e6%b3%95-SEQMrfqrFj\">\u6e38\u6a19\u7684\u4f7f\u7528\u65b9\u6cd5<\/h2>\n<p>\u4ee5\u4e0b\u662f\u4f7f\u7528 MSSQL \u6e38\u6a19\u7684\u57fa\u672c\u6b65\u9a5f\uff1a<\/p>\n<pre><code>\n-- \u5ba3\u544a\u6e38\u6a19\nDECLARE cursor_name CURSOR FOR\nSELECT column1, column2 FROM table_name WHERE condition;\n\n-- \u6253\u958b\u6e38\u6a19\nOPEN cursor_name;\n\n-- \u53d6\u5f97\u7b2c\u4e00\u884c\u6578\u64da\nFETCH NEXT FROM cursor_name INTO @variable1, @variable2;\n\n-- \u9010\u884c\u8655\u7406\nWHILE @@FETCH_STATUS = 0\nBEGIN\n    -- \u5728\u9019\u88e1\u9032\u884c\u6578\u64da\u8655\u7406\n    PRINT @variable1;\n    \n    -- \u7372\u53d6\u4e0b\u4e00\u884c\u6578\u64da\n    FETCH NEXT FROM cursor_name INTO @variable1, @variable2;\nEND\n\n-- \u95dc\u9589\u6e38\u6a19\nCLOSE cursor_name;\n\n-- \u91cb\u653e\u6e38\u6a19\nDEALLOCATE cursor_name;\n<\/code><\/pre>\n<h2 id=\"%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-SEQMrfqrFj\">\u6ce8\u610f\u4e8b\u9805<\/h2>\n<p>\u5728\u4f7f\u7528\u6e38\u6a19\u6642\uff0c\u958b\u767c\u8005\u61c9\u6ce8\u610f\u4ee5\u4e0b\u5e7e\u9ede\uff1a<\/p>\n<ul>\n<li>\u6e38\u6a19\u7684\u6027\u80fd\uff1a\u6e38\u6a19\u901a\u5e38\u6bd4\u96c6\u5408\u64cd\u4f5c\u6162\uff0c\u56e0\u6b64\u61c9\u8b39\u614e\u4f7f\u7528\uff0c\u76e1\u91cf\u907f\u514d\u5728\u9ad8\u8ca0\u8f09\u7684\u74b0\u5883\u4e2d\u4f7f\u7528\u3002<\/li>\n<li>\u8cc7\u6e90\u7ba1\u7406\uff1a\u78ba\u4fdd\u5728\u4f7f\u7528\u5b8c\u6e38\u6a19\u5f8c\u95dc\u9589\u4e26\u91cb\u653e\u8cc7\u6e90\uff0c\u4ee5\u907f\u514d\u8a18\u61b6\u9ad4\u6d29\u6f0f\u3002<\/li>\n<li>\u66ff\u4ee3\u65b9\u6848\uff1a\u5728\u53ef\u80fd\u7684\u60c5\u6cc1\u4e0b\uff0c\u8003\u616e\u4f7f\u7528\u96c6\u5408\u64cd\u4f5c\u4f86\u66ff\u4ee3\u6e38\u6a19\uff0c\u4ee5\u63d0\u9ad8\u6027\u80fd\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-SEQMrfqrFj\">\u7e3d\u7d50<\/h2>\n<p>MSSQL \u6e38\u6a19\u662f\u4e00\u500b\u5f37\u5927\u7684\u5de5\u5177\uff0c\u80fd\u5920\u5e6b\u52a9\u958b\u767c\u8005\u9010\u884c\u8655\u7406\u67e5\u8a62\u7d50\u679c\u3002\u7136\u800c\uff0c\u4f7f\u7528\u6e38\u6a19\u6642\u5fc5\u9808\u8b39\u614e\uff0c\u56e0\u70ba\u5b83\u5011\u53ef\u80fd\u6703\u5f71\u97ff\u6027\u80fd\u3002\u5728\u8a31\u591a\u60c5\u6cc1\u4e0b\uff0c\u4f7f\u7528\u96c6\u5408\u64cd\u4f5c\u53ef\u80fd\u662f\u4e00\u500b\u66f4\u597d\u7684\u9078\u64c7\u3002\u4e86\u89e3\u6e38\u6a19\u7684\u6b63\u78ba\u4f7f\u7528\u65b9\u6cd5\uff0c\u80fd\u5920\u5e6b\u52a9\u958b\u767c\u8005\u66f4\u6709\u6548\u5730\u7ba1\u7406\u6578\u64da\u3002<\/p>\n<p>\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684 <a href=\"https:\/\/server.hk\">\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 <a href=\"https:\/\/server.hk\">\u4e91\u670d\u52a1\u5668<\/a> \u9084\u662f\u5176\u4ed6\u670d\u52d9\uff0c\u6211\u5011\u90fd\u80fd\u70ba\u60a8\u63d0\u4f9b\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u638c\u63e1MSSQL\u6e38\u6a19\u7684\u6b63\u78ba\u4f7f\u7528\u65b9\u6cd5\uff0c\u63d0\u5347\u6578\u64da\u64cd\u4f5c\u6548\u7387\uff0c\u907f\u514d\u5e38\u898b\u932f\u8aa4\uff0c\u5be6\u73fe\u9ad8\u6548\u6578\u64da\u8655\u7406\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-66289","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/66289","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=66289"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/66289\/revisions"}],"predecessor-version":[{"id":66290,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/66289\/revisions\/66290"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=66289"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=66289"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=66289"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}