{"id":64935,"date":"2024-10-14T12:50:17","date_gmt":"2024-10-14T04:50:17","guid":{"rendered":"https:\/\/server.hk\/cnblog\/64935\/"},"modified":"2024-10-14T12:50:17","modified_gmt":"2024-10-14T04:50:17","slug":"mssql%e6%9f%a5%e8%a9%a2%e8%bf%94%e5%9b%9e%e7%9a%84%e8%a1%8c%e6%95%b8%e6%9c%89%e5%a4%9a%e5%b0%91%ef%bc%9f%ef%bc%88mssql%e6%9f%a5%e8%a9%a2%e8%a1%8c%e6%95%b8%ef%bc%89","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/64935\/","title":{"rendered":"mssql\u67e5\u8a62\u8fd4\u56de\u7684\u884c\u6578\u6709\u591a\u5c11\uff1f\uff08mssql\u67e5\u8a62\u884c\u6578\uff09"},"content":{"rendered":"<h1 id=\"mssql%e6%9f%a5%e8%a9%a2%e8%bf%94%e5%9b%9e%e7%9a%84%e8%a1%8c%e6%95%b8%e6%9c%89%e5%a4%9a%e5%b0%91%ef%bc%9f%ef%bc%88mssql%e6%9f%a5%e8%a9%a2%e8%a1%8c%e6%95%b8%ef%bc%89-aXUOFANFvG\">MSSQL\u67e5\u8a62\u8fd4\u56de\u7684\u884c\u6578\u6709\u591a\u5c11\uff1f\uff08MSSQL\u67e5\u8a62\u884c\u6578\uff09<\/h1>\n<p>\u5728\u4f7f\u7528Microsoft SQL Server\uff08MSSQL\uff09\u9032\u884c\u6578\u64da\u67e5\u8a62\u6642\uff0c\u4e86\u89e3\u67e5\u8a62\u8fd4\u56de\u7684\u884c\u6578\u662f\u975e\u5e38\u91cd\u8981\u7684\u3002\u9019\u4e0d\u50c5\u6709\u52a9\u65bc\u8a55\u4f30\u67e5\u8a62\u7684\u6548\u7387\uff0c\u9084\u80fd\u5e6b\u52a9\u958b\u767c\u8005\u548c\u6578\u64da\u5206\u6790\u5e2b\u66f4\u597d\u5730\u7406\u89e3\u6578\u64da\u7684\u5206\u4f48\u60c5\u6cc1\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5982\u4f55\u5728MSSQL\u4e2d\u67e5\u8a62\u8fd4\u56de\u7684\u884c\u6578\uff0c\u4e26\u63d0\u4f9b\u4e00\u4e9b\u5be6\u7528\u7684\u793a\u4f8b\u548c\u6280\u5de7\u3002<\/p>\n<h2 id=\"%e4%bd%bf%e7%94%a8count%e5%87%bd%e6%95%b8%e6%9f%a5%e8%a9%a2%e8%a1%8c%e6%95%b8-aXUOFANFvG\">\u4f7f\u7528COUNT\u51fd\u6578\u67e5\u8a62\u884c\u6578<\/h2>\n<p>\u6700\u76f4\u63a5\u7684\u65b9\u6cd5\u662f\u4f7f\u7528SQL\u7684 <code>COUNT<\/code> \u51fd\u6578\u3002\u9019\u500b\u51fd\u6578\u53ef\u4ee5\u8a08\u7b97\u7b26\u5408\u7279\u5b9a\u689d\u4ef6\u7684\u884c\u6578\u3002\u4ee5\u4e0b\u662f\u4e00\u500b\u57fa\u672c\u7684\u793a\u4f8b\uff1a<\/p>\n<pre><code>SELECT COUNT(*) FROM \u8868\u540d WHERE \u689d\u4ef6;<\/code><\/pre>\n<p>\u5728\u9019\u500b\u67e5\u8a62\u4e2d\uff0c<code>\u8868\u540d<\/code> \u662f\u4f60\u8981\u67e5\u8a62\u7684\u6578\u64da\u8868\uff0c\u800c <code>\u689d\u4ef6<\/code> \u5247\u662f\u4f60\u5e0c\u671b\u904e\u6ffe\u7684\u689d\u4ef6\u3002\u4f8b\u5982\uff0c\u5982\u679c\u4f60\u60f3\u8a08\u7b97 <code>employees<\/code> \u8868\u4e2d\u6240\u6709\u54e1\u5de5\u7684\u6578\u91cf\uff0c\u53ef\u4ee5\u9019\u6a23\u5beb\uff1a<\/p>\n<pre><code>SELECT COUNT(*) FROM employees;<\/code><\/pre>\n<h2 id=\"%e4%bd%bf%e7%94%a8select%e8%aa%9e%e5%8f%a5%e7%8d%b2%e5%8f%96%e8%a1%8c%e6%95%b8-aXUOFANFvG\">\u4f7f\u7528SELECT\u8a9e\u53e5\u7372\u53d6\u884c\u6578<\/h2>\n<p>\u9664\u4e86\u4f7f\u7528 <code>COUNT<\/code> \u51fd\u6578\u5916\uff0c\u4f60\u9084\u53ef\u4ee5\u4f7f\u7528 <code>SELECT<\/code> \u8a9e\u53e5\u4f86\u7372\u53d6\u884c\u6578\u3002\u9019\u7a2e\u65b9\u6cd5\u901a\u5e38\u7528\u65bc\u9700\u8981\u8fd4\u56de\u5177\u9ad4\u6578\u64da\u7684\u60c5\u6cc1\u3002\u4f60\u53ef\u4ee5\u5728\u67e5\u8a62\u7684\u6700\u5f8c\u6dfb\u52a0 <code>SELECT @@ROWCOUNT<\/code> \u4f86\u7372\u53d6\u8fd4\u56de\u7684\u884c\u6578\uff1a<\/p>\n<pre><code>SELECT * FROM \u8868\u540d WHERE \u689d\u4ef6;\nSELECT @@ROWCOUNT AS \u884c\u6578;<\/code><\/pre>\n<p>\u9019\u6a23\uff0c\u4f60\u53ef\u4ee5\u5728\u57f7\u884c\u67e5\u8a62\u5f8c\u7acb\u5373\u7372\u5f97\u884c\u6578\u3002\u4f8b\u5982\uff1a<\/p>\n<pre><code>SELECT * FROM employees WHERE department = 'Sales';\nSELECT @@ROWCOUNT AS \u884c\u6578;<\/code><\/pre>\n<h2 id=\"%e4%bd%bf%e7%94%a8sql-server-management-studio-ssms-%e7%8d%b2%e5%8f%96%e8%a1%8c%e6%95%b8-aXUOFANFvG\">\u4f7f\u7528SQL Server Management Studio (SSMS) \u7372\u53d6\u884c\u6578<\/h2>\n<p>\u5982\u679c\u4f60\u4f7f\u7528\u7684\u662fSQL Server Management Studio (SSMS)\uff0c\u5728\u57f7\u884c\u67e5\u8a62\u5f8c\uff0c\u7d50\u679c\u7a97\u53e3\u7684\u5e95\u90e8\u6703\u986f\u793a\u8fd4\u56de\u7684\u884c\u6578\u3002\u9019\u5c0d\u65bc\u5feb\u901f\u6aa2\u67e5\u67e5\u8a62\u7d50\u679c\u975e\u5e38\u6709\u7528\u3002<\/p>\n<h2 id=\"%e6%80%a7%e8%83%bd%e8%80%83%e9%87%8f-aXUOFANFvG\">\u6027\u80fd\u8003\u91cf<\/h2>\n<p>\u5728\u67e5\u8a62\u5927\u91cf\u6578\u64da\u6642\uff0c\u4f7f\u7528 <code>COUNT<\/code> \u51fd\u6578\u53ef\u80fd\u6703\u5f71\u97ff\u6027\u80fd\u3002\u7279\u5225\u662f\u5728\u5927\u578b\u6578\u64da\u96c6\u4e0a\uff0c\u9019\u53ef\u80fd\u6703\u5c0e\u81f4\u67e5\u8a62\u8b8a\u5f97\u7de9\u6162\u3002\u70ba\u4e86\u63d0\u9ad8\u6027\u80fd\uff0c\u53ef\u4ee5\u8003\u616e\u4ee5\u4e0b\u5e7e\u9ede\uff1a<\/p>\n<ul>\n<li>\u4f7f\u7528\u7d22\u5f15\uff1a\u78ba\u4fdd\u5728\u67e5\u8a62\u7684\u689d\u4ef6\u5b57\u6bb5\u4e0a\u6709\u9069\u7576\u7684\u7d22\u5f15\uff0c\u4ee5\u52a0\u5feb\u67e5\u8a62\u901f\u5ea6\u3002<\/li>\n<li>\u9650\u5236\u8fd4\u56de\u7684\u884c\u6578\uff1a\u5982\u679c\u53ea\u9700\u8981\u90e8\u5206\u6578\u64da\uff0c\u53ef\u4ee5\u4f7f\u7528 <code>TOP<\/code> \u9650\u5236\u8fd4\u56de\u7684\u884c\u6578\u3002<\/li>\n<li>\u8003\u616e\u4f7f\u7528 <code>WITH (NOLOCK)<\/code>\uff1a\u9019\u53ef\u4ee5\u5728\u67e5\u8a62\u6642\u907f\u514d\u9396\u5b9a\uff0c\u4f46\u9700\u8b39\u614e\u4f7f\u7528\uff0c\u56e0\u70ba\u53ef\u80fd\u6703\u8fd4\u56de\u4e0d\u4e00\u81f4\u7684\u6578\u64da\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b5%90%e8%ab%96-aXUOFANFvG\">\u7d50\u8ad6<\/h2>\n<p>\u4e86\u89e3\u5982\u4f55\u5728MSSQL\u4e2d\u67e5\u8a62\u8fd4\u56de\u7684\u884c\u6578\u5c0d\u65bc\u6578\u64da\u7ba1\u7406\u548c\u5206\u6790\u81f3\u95dc\u91cd\u8981\u3002\u7121\u8ad6\u662f\u4f7f\u7528 <code>COUNT<\/code> \u51fd\u6578\u9084\u662f <code>SELECT @@ROWCOUNT<\/code>\uff0c\u9019\u4e9b\u65b9\u6cd5\u90fd\u80fd\u5e6b\u52a9\u4f60\u6709\u6548\u5730\u7372\u53d6\u6240\u9700\u7684\u4fe1\u606f\u3002\u96a8\u8457\u6578\u64da\u91cf\u7684\u589e\u9577\uff0c\u512a\u5316\u67e5\u8a62\u6027\u80fd\u4e5f\u8b8a\u5f97\u6108\u52a0\u91cd\u8981\u3002<\/p>\n<p>\u5982\u679c\u4f60\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684 <a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a> \u89e3\u6c7a\u65b9\u6848\u4f86\u652f\u6301\u4f60\u7684\u6578\u64da\u5eab\u9700\u6c42\uff0cServer.HK \u63d0\u4f9b\u591a\u7a2e\u9078\u64c7\uff0c\u5e6b\u52a9\u4f60\u8f15\u9b06\u7ba1\u7406\u548c\u64f4\u5c55\u4f60\u7684\u696d\u52d9\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u4e86\u89e3\u5982\u4f55\u5728MSSQL\u4e2d\u67e5\u8a62\u8fd4\u56de\u7684\u884c\u6578\uff0c\u638c\u63e1\u6709\u6548\u7684\u67e5\u8a62\u6280\u5de7\uff0c\u63d0\u5347\u6578\u64da\u5206\u6790\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-64935","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/64935","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=64935"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/64935\/revisions"}],"predecessor-version":[{"id":64936,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/64935\/revisions\/64936"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=64935"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=64935"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=64935"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}