{"id":138389,"date":"2024-10-31T14:04:19","date_gmt":"2024-10-31T06:04:19","guid":{"rendered":"https:\/\/server.hk\/cnblog\/138389\/"},"modified":"2024-10-31T14:04:19","modified_gmt":"2024-10-31T06:04:19","slug":"sql-server%e9%81%bf%e5%85%8d%e9%98%bb%e5%a1%9e%e7%9a%84%e6%96%b9%e6%a1%88%e6%9c%89%e5%93%aa%e4%ba%9b%ef%bc%9f","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/138389\/","title":{"rendered":"SQL Server\u907f\u514d\u963b\u585e\u7684\u65b9\u6848\u6709\u54ea\u4e9b\uff1f"},"content":{"rendered":"<h1 id=\"sql-server%e9%81%bf%e5%85%8d%e9%98%bb%e5%a1%9e%e7%9a%84%e6%96%b9%e6%a1%88%e6%9c%89%e5%93%aa%e4%ba%9b%ef%bc%9f-iAsTRApNMY\">SQL Server\u907f\u514d\u963b\u585e\u7684\u65b9\u6848\u6709\u54ea\u4e9b\uff1f<\/h1>\n<p>\u5728\u8cc7\u6599\u5eab\u7ba1\u7406\u7cfb\u7d71\u4e2d\uff0c\u963b\u585e\u662f\u4e00\u500b\u5e38\u898b\u7684\u554f\u984c\uff0c\u7279\u5225\u662f\u5728\u9ad8\u4f75\u767c\u7684\u74b0\u5883\u4e2d\u3002SQL Server\u4f5c\u70ba\u4e00\u500b\u5ee3\u6cdb\u4f7f\u7528\u7684\u95dc\u806f\u5f0f\u8cc7\u6599\u5eab\u7ba1\u7406\u7cfb\u7d71\uff0c\u9762\u5c0d\u963b\u585e\u554f\u984c\u6642\uff0c\u7ba1\u7406\u54e1\u9700\u8981\u63a1\u53d6\u6709\u6548\u7684\u63aa\u65bd\u4f86\u6e1b\u5c11\u6216\u907f\u514d\u963b\u585e\u7684\u767c\u751f\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5e7e\u7a2e\u6709\u6548\u7684\u65b9\u6848\uff0c\u4ee5\u5e6b\u52a9SQL Server\u7528\u6236\u6e1b\u5c11\u963b\u585e\u7684\u5f71\u97ff\u3002<\/p>\n<h2 id=\"1-%e4%bd%bf%e7%94%a8%e9%81%a9%e7%95%b6%e7%9a%84%e9%9a%94%e9%9b%a2%e7%b4%9a%e5%88%a5-iAsTRApNMY\">1. \u4f7f\u7528\u9069\u7576\u7684\u9694\u96e2\u7d1a\u5225<\/h2>\n<p>SQL Server\u63d0\u4f9b\u4e86\u591a\u7a2e\u9694\u96e2\u7d1a\u5225\uff0c\u9019\u4e9b\u7d1a\u5225\u6c7a\u5b9a\u4e86\u4e8b\u52d9\u4e4b\u9593\u7684\u53ef\u898b\u6027\u548c\u9396\u5b9a\u884c\u70ba\u3002\u9078\u64c7\u5408\u9069\u7684\u9694\u96e2\u7d1a\u5225\u53ef\u4ee5\u6709\u6548\u6e1b\u5c11\u963b\u585e\u7684\u60c5\u6cc1\u3002\u4ee5\u4e0b\u662f\u5e7e\u7a2e\u5e38\u898b\u7684\u9694\u96e2\u7d1a\u5225\uff1a<\/p>\n<ul>\n<li><strong>\u8b80\u53d6\u672a\u63d0\u4ea4\uff08READ UNCOMMITTED\uff09<\/strong>\uff1a\u6b64\u7d1a\u5225\u5141\u8a31\u8b80\u53d6\u672a\u63d0\u4ea4\u7684\u6578\u64da\uff0c\u5f9e\u800c\u907f\u514d\u9396\u5b9a\uff0c\u4f46\u53ef\u80fd\u6703\u5c0e\u81f4\u9ad2\u8b80\u3002<\/li>\n<li><strong>\u8b80\u53d6\u5df2\u63d0\u4ea4\uff08READ COMMITTED\uff09<\/strong>\uff1a\u9019\u662fSQL Server\u7684\u9ed8\u8a8d\u9694\u96e2\u7d1a\u5225\uff0c\u80fd\u5920\u907f\u514d\u9ad2\u8b80\uff0c\u4f46\u5728\u9ad8\u4f75\u767c\u60c5\u6cc1\u4e0b\u4ecd\u53ef\u80fd\u5c0e\u81f4\u963b\u585e\u3002<\/li>\n<li><strong>\u5feb\u7167\u9694\u96e2\uff08SNAPSHOT\uff09<\/strong>\uff1a\u6b64\u7d1a\u5225\u5141\u8a31\u8b80\u53d6\u4e8b\u52d9\u958b\u59cb\u6642\u7684\u6578\u64da\u5feb\u7167\uff0c\u5f9e\u800c\u907f\u514d\u963b\u585e\uff0c\u4f46\u9700\u8981\u984d\u5916\u7684\u7248\u672c\u5b58\u5132\u3002<\/li>\n<\/ul>\n<p>\u6839\u64da\u5177\u9ad4\u7684\u696d\u52d9\u9700\u6c42\uff0c\u9078\u64c7\u5408\u9069\u7684\u9694\u96e2\u7d1a\u5225\u53ef\u4ee5\u6709\u6548\u6e1b\u5c11\u963b\u585e\u7684\u767c\u751f\u3002<\/p>\n<h2 id=\"2-%e5%84%aa%e5%8c%96%e6%9f%a5%e8%a9%a2%e6%80%a7%e8%83%bd-iAsTRApNMY\">2. \u512a\u5316\u67e5\u8a62\u6027\u80fd<\/h2>\n<p>\u67e5\u8a62\u6027\u80fd\u4e0d\u4f73\u662f\u5c0e\u81f4\u963b\u585e\u7684\u4e3b\u8981\u539f\u56e0\u4e4b\u4e00\u3002\u901a\u904e\u512a\u5316\u67e5\u8a62\uff0c\u53ef\u4ee5\u6e1b\u5c11\u57f7\u884c\u6642\u9593\uff0c\u5f9e\u800c\u964d\u4f4e\u9396\u5b9a\u7684\u6301\u7e8c\u6642\u9593\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u512a\u5316\u67e5\u8a62\u6027\u80fd\u7684\u5efa\u8b70\uff1a<\/p>\n<ul>\n<li><strong>\u4f7f\u7528\u7d22\u5f15<\/strong>\uff1a\u78ba\u4fdd\u67e5\u8a62\u4e2d\u4f7f\u7528\u7684\u5217\u6709\u9069\u7576\u7684\u7d22\u5f15\uff0c\u4ee5\u63d0\u9ad8\u67e5\u8a62\u901f\u5ea6\u3002<\/li>\n<li><strong>\u907f\u514d\u4f7f\u7528SELECT *<\/strong>\uff1a\u50c5\u9078\u64c7\u9700\u8981\u7684\u5217\uff0c\u6e1b\u5c11\u6578\u64da\u50b3\u8f38\u91cf\u3002<\/li>\n<li><strong>\u4f7f\u7528JOIN\u800c\u975e\u5b50\u67e5\u8a62<\/strong>\uff1a\u5728\u53ef\u80fd\u7684\u60c5\u6cc1\u4e0b\uff0c\u4f7f\u7528JOIN\u4f86\u66ff\u4ee3\u5b50\u67e5\u8a62\uff0c\u4ee5\u63d0\u9ad8\u6027\u80fd\u3002<\/li>\n<\/ul>\n<p>\u901a\u904e\u9019\u4e9b\u512a\u5316\u63aa\u65bd\uff0c\u53ef\u4ee5\u986f\u8457\u63d0\u9ad8\u67e5\u8a62\u6548\u7387\uff0c\u5f9e\u800c\u6e1b\u5c11\u963b\u585e\u7684\u53ef\u80fd\u6027\u3002<\/p>\n<h2 id=\"3-%e4%bd%bf%e7%94%a8%e9%9d%9e%e9%8e%96%e5%ae%9a%e6%9f%a5%e8%a9%a2-iAsTRApNMY\">3. \u4f7f\u7528\u975e\u9396\u5b9a\u67e5\u8a62<\/h2>\n<p>\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0c\u53ef\u4ee5\u4f7f\u7528\u975e\u9396\u5b9a\u67e5\u8a62\u4f86\u907f\u514d\u963b\u585e\u3002\u4f8b\u5982\uff0c\u4f7f\u7528WITH (NOLOCK)\u63d0\u793a\u53ef\u4ee5\u5728\u67e5\u8a62\u6642\u4e0d\u7372\u53d6\u9396\u5b9a\uff0c\u9019\u6a23\u53ef\u4ee5\u907f\u514d\u963b\u585e\uff0c\u4f46\u9700\u8981\u6ce8\u610f\u53ef\u80fd\u6703\u5c0e\u81f4\u9ad2\u8b80\u7684\u98a8\u96aa\u3002<\/p>\n<pre><code>SELECT * FROM YourTable WITH (NOLOCK) WHERE YourCondition;<\/code><\/pre>\n<p>\u9019\u7a2e\u65b9\u6cd5\u9069\u5408\u65bc\u5c0d\u6578\u64da\u4e00\u81f4\u6027\u8981\u6c42\u4e0d\u9ad8\u7684\u67e5\u8a62\u3002<\/p>\n<h2 id=\"4-%e5%88%86%e6%9e%90%e5%92%8c%e8%aa%bf%e6%95%b4%e4%ba%8b%e5%8b%99-iAsTRApNMY\">4. \u5206\u6790\u548c\u8abf\u6574\u4e8b\u52d9<\/h2>\n<p>\u9577\u6642\u9593\u904b\u884c\u7684\u4e8b\u52d9\u662f\u5c0e\u81f4\u963b\u585e\u7684\u53e6\u4e00\u500b\u4e3b\u8981\u539f\u56e0\u3002\u901a\u904e\u5206\u6790\u4e8b\u52d9\u7684\u57f7\u884c\u6642\u9593\uff0c\u53ef\u4ee5\u627e\u51fa\u74f6\u9838\u4e26\u9032\u884c\u8abf\u6574\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5efa\u8b70\uff1a<\/p>\n<ul>\n<li><strong>\u5c07\u5927\u4e8b\u52d9\u62c6\u5206\u70ba\u5c0f\u4e8b\u52d9<\/strong>\uff1a\u9019\u6a23\u53ef\u4ee5\u6e1b\u5c11\u6bcf\u500b\u4e8b\u52d9\u6301\u6709\u9396\u5b9a\u7684\u6642\u9593\u3002<\/li>\n<li><strong>\u907f\u514d\u5728\u4e8b\u52d9\u4e2d\u57f7\u884c\u9577\u6642\u9593\u7684\u64cd\u4f5c<\/strong>\uff1a\u4f8b\u5982\uff0c\u907f\u514d\u5728\u4e8b\u52d9\u4e2d\u57f7\u884c\u7528\u6236\u8f38\u5165\u6216\u7b49\u5f85\u64cd\u4f5c\u3002<\/li>\n<\/ul>\n<p>\u901a\u904e\u9019\u4e9b\u8abf\u6574\uff0c\u53ef\u4ee5\u6709\u6548\u964d\u4f4e\u963b\u585e\u7684\u98a8\u96aa\u3002<\/p>\n<h2 id=\"5-%e7%9b%a3%e6%8e%a7%e5%92%8c%e8%a8%ba%e6%96%b7-iAsTRApNMY\">5. \u76e3\u63a7\u548c\u8a3a\u65b7<\/h2>\n<p>\u5b9a\u671f\u76e3\u63a7SQL Server\u7684\u6027\u80fd\u6307\u6a19\uff0c\u53ca\u6642\u767c\u73fe\u548c\u89e3\u6c7a\u963b\u585e\u554f\u984c\u662f\u975e\u5e38\u91cd\u8981\u7684\u3002\u53ef\u4ee5\u4f7f\u7528SQL Server\u7684\u52d5\u614b\u7ba1\u7406\u8996\u5716\uff08DMVs\uff09\u4f86\u76e3\u63a7\u7576\u524d\u7684\u963b\u585e\u60c5\u6cc1\u3002\u4f8b\u5982\uff1a<\/p>\n<pre><code>SELECT * FROM sys.dm_exec_requests WHERE blocking_session_id  0;<\/code><\/pre>\n<p>\u9019\u689d\u67e5\u8a62\u53ef\u4ee5\u5e6b\u52a9\u7ba1\u7406\u54e1\u627e\u51fa\u7576\u524d\u88ab\u963b\u585e\u7684\u8acb\u6c42\u53ca\u5176\u963b\u585e\u6e90\u3002<\/p>\n<h2 id=\"%e7%b8%bd%e7%b5%90-iAsTRApNMY\">\u7e3d\u7d50<\/h2>\n<p>\u5728SQL Server\u4e2d\uff0c\u963b\u585e\u554f\u984c\u53ef\u80fd\u6703\u5f71\u97ff\u7cfb\u7d71\u7684\u6574\u9ad4\u6027\u80fd\u548c\u7528\u6236\u9ad4\u9a57\u3002\u901a\u904e\u9078\u64c7\u9069\u7576\u7684\u9694\u96e2\u7d1a\u5225\u3001\u512a\u5316\u67e5\u8a62\u6027\u80fd\u3001\u4f7f\u7528\u975e\u9396\u5b9a\u67e5\u8a62\u3001\u5206\u6790\u548c\u8abf\u6574\u4e8b\u52d9\u4ee5\u53ca\u5b9a\u671f\u76e3\u63a7\u548c\u8a3a\u65b7\uff0c\u53ef\u4ee5\u6709\u6548\u6e1b\u5c11\u963b\u585e\u7684\u767c\u751f\u3002\u9019\u4e9b\u63aa\u65bd\u4e0d\u50c5\u80fd\u63d0\u9ad8\u7cfb\u7d71\u7684\u7a69\u5b9a\u6027\uff0c\u9084\u80fd\u63d0\u5347\u7528\u6236\u7684\u6eff\u610f\u5ea6\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\u4e0d\u540c\u7528\u6236\u7684\u9700\u6c42\u3002\u7121\u8ad6\u662f\u4f01\u696d\u7d1a\u61c9\u7528\u9084\u662f\u500b\u4eba\u9805\u76ee\uff0c\u6211\u5011\u7684 <a href=\"https:\/\/server.hk\">\u4f3a\u670d\u5668<\/a> \u90fd\u80fd\u70ba\u60a8\u63d0\u4f9b\u7a69\u5b9a\u7684\u652f\u6301\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22SQL Server\u4e2d\u907f\u514d\u963b\u585e\u7684\u6709\u6548\u65b9\u6848\uff0c\u5305\u62ec\u4f18\u5316\u67e5\u8be2\u3001\u4f7f\u7528\u9501\u5b9a\u63d0\u793a\u548c\u8c03\u6574\u9694\u79bb\u7ea7\u522b\u7b49\u7b56\u7565\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-138389","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/138389","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=138389"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/138389\/revisions"}],"predecessor-version":[{"id":138390,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/138389\/revisions\/138390"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=138389"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=138389"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=138389"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}