{"id":152087,"date":"2024-11-01T20:00:22","date_gmt":"2024-11-01T12:00:22","guid":{"rendered":"https:\/\/server.hk\/cnblog\/152087\/"},"modified":"2024-11-01T20:00:23","modified_gmt":"2024-11-01T12:00:23","slug":"%e9%81%bf%e5%85%8dsql-server%e9%98%bb%e5%a1%9e%e9%80%9a%e9%81%8e%e8%a8%ad%e8%a8%88%e6%87%89%e7%94%a8%e7%a8%8b%e5%ba%8f%e4%be%86%e9%80%b2%e8%a1%8c","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/152087\/","title":{"rendered":"\u907f\u514dSQL Server\u963b\u585e\u901a\u904e\u8a2d\u8a08\u61c9\u7528\u7a0b\u5e8f\u4f86\u9032\u884c"},"content":{"rendered":"<h1 id=\"%e9%81%bf%e5%85%8dsql-server%e9%98%bb%e5%a1%9e%e9%80%9a%e9%81%8e%e8%a8%ad%e8%a8%88%e6%87%89%e7%94%a8%e7%a8%8b%e5%ba%8f%e4%be%86%e9%80%b2%e8%a1%8c-QRSsFCanuY\">\u907f\u514dSQL Server\u963b\u585e\u901a\u904e\u8a2d\u8a08\u61c9\u7528\u7a0b\u5e8f\u4f86\u9032\u884c<\/h1>\n<p>\u5728\u7576\u4eca\u7684\u6578\u64da\u9a45\u52d5\u4e16\u754c\u4e2d\uff0cSQL Server\u4f5c\u70ba\u4e00\u500b\u6d41\u884c\u7684\u95dc\u4fc2\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\uff0c\u5ee3\u6cdb\u61c9\u7528\u65bc\u5404\u7a2e\u696d\u52d9\u61c9\u7528\u4e2d\u3002\u7136\u800c\uff0c\u96a8\u8457\u7528\u6236\u6578\u91cf\u7684\u589e\u52a0\u548c\u6578\u64da\u91cf\u7684\u64f4\u5927\uff0cSQL Server\u7684\u6027\u80fd\u554f\u984c\uff0c\u7279\u5225\u662f\u963b\u585e\u554f\u984c\uff0c\u8b8a\u5f97\u8d8a\u4f86\u8d8a\u7a81\u51fa\u3002\u963b\u585e\u6703\u5c0e\u81f4\u61c9\u7528\u7a0b\u5e8f\u7684\u97ff\u61c9\u6642\u9593\u5ef6\u9577\uff0c\u5f71\u97ff\u7528\u6236\u9ad4\u9a57\u3002\u56e0\u6b64\uff0c\u8a2d\u8a08\u4e00\u500b\u80fd\u5920\u6709\u6548\u907f\u514dSQL Server\u963b\u585e\u7684\u61c9\u7528\u7a0b\u5e8f\u81f3\u95dc\u91cd\u8981\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%afsql-server%e9%98%bb%e5%a1%9e%ef%bc%9f-QRSsFCanuY\">\u4ec0\u9ebc\u662fSQL Server\u963b\u585e\uff1f<\/h2>\n<p>SQL Server\u963b\u585e\u662f\u6307\u7576\u4e00\u500b\u4e8b\u52d9\u6b63\u5728\u4f7f\u7528\u67d0\u500b\u8cc7\u6e90\uff08\u5982\u8868\u6216\u884c\uff09\u6642\uff0c\u5176\u4ed6\u4e8b\u52d9\u7121\u6cd5\u8a2a\u554f\u8a72\u8cc7\u6e90\uff0c\u5f9e\u800c\u5c0e\u81f4\u7684\u7b49\u5f85\u72c0\u614b\u3002\u9019\u7a2e\u60c5\u6cc1\u901a\u5e38\u767c\u751f\u5728\u591a\u500b\u4e8b\u52d9\u540c\u6642\u57f7\u884c\u6642\uff0c\u7279\u5225\u662f\u5728\u9ad8\u4e26\u767c\u74b0\u5883\u4e2d\u3002\u963b\u585e\u4e0d\u50c5\u5f71\u97ff\u6027\u80fd\uff0c\u9084\u53ef\u80fd\u5c0e\u81f4\u6b7b\u9396\uff0c\u9032\u4e00\u6b65\u52a0\u5287\u554f\u984c\u3002<\/p>\n<h2 id=\"%e8%a8%ad%e8%a8%88%e6%87%89%e7%94%a8%e7%a8%8b%e5%ba%8f%e4%bb%a5%e9%81%bf%e5%85%8d%e9%98%bb%e5%a1%9e%e7%9a%84%e7%ad%96%e7%95%a5-QRSsFCanuY\">\u8a2d\u8a08\u61c9\u7528\u7a0b\u5e8f\u4ee5\u907f\u514d\u963b\u585e\u7684\u7b56\u7565<\/h2>\n<h3 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-QRSsFCanuY\">1. \u4f7f\u7528\u9069\u7576\u7684\u9694\u96e2\u7d1a\u5225<\/h3>\n<p>SQL Server\u63d0\u4f9b\u4e86\u591a\u7a2e\u9694\u96e2\u7d1a\u5225\uff0c\u6bcf\u7a2e\u7d1a\u5225\u5c0d\u963b\u585e\u7684\u5f71\u97ff\u4e0d\u540c\u3002\u9078\u64c7\u5408\u9069\u7684\u9694\u96e2\u7d1a\u5225\u53ef\u4ee5\u6709\u6548\u6e1b\u5c11\u963b\u585e\u3002\u4f8b\u5982\uff0c\u4f7f\u7528\u201c\u8b80\u53d6\u672a\u63d0\u4ea4\u201d\uff08READ UNCOMMITTED\uff09\u9694\u96e2\u7d1a\u5225\u53ef\u4ee5\u5141\u8a31\u8b80\u53d6\u672a\u63d0\u4ea4\u7684\u6578\u64da\uff0c\u5f9e\u800c\u6e1b\u5c11\u8b80\u53d6\u64cd\u4f5c\u7684\u963b\u585e\u3002\u7136\u800c\uff0c\u9019\u6a23\u505a\u53ef\u80fd\u6703\u5c0e\u81f4\u8b80\u53d6\u5230\u4e0d\u4e00\u81f4\u7684\u6578\u64da\uff0c\u56e0\u6b64\u9700\u8981\u6839\u64da\u5177\u9ad4\u60c5\u6cc1\u9032\u884c\u9078\u64c7\u3002<\/p>\n<pre><code>SET TRANSACTION ISOLATION LEVEL READ UNCOMMITTED;<\/code><\/pre>\n<h3 id=\"2-%e5%84%aa%e5%8c%96%e6%9f%a5%e8%a9%a2-QRSsFCanuY\">2. \u512a\u5316\u67e5\u8a62<\/h3>\n<p>\u67e5\u8a62\u7684\u6027\u80fd\u76f4\u63a5\u5f71\u97ff\u5230\u963b\u585e\u7684\u767c\u751f\u3002\u901a\u904e\u512a\u5316\u67e5\u8a62\uff0c\u53ef\u4ee5\u6e1b\u5c11\u57f7\u884c\u6642\u9593\uff0c\u5f9e\u800c\u964d\u4f4e\u963b\u585e\u7684\u53ef\u80fd\u6027\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u512a\u5316\u67e5\u8a62\u7684\u5efa\u8b70\uff1a<\/p>\n<ul>\n<li>\u4f7f\u7528\u7d22\u5f15\uff1a\u78ba\u4fdd\u67e5\u8a62\u4e2d\u4f7f\u7528\u7684\u5217\u6709\u9069\u7576\u7684\u7d22\u5f15\uff0c\u4ee5\u52a0\u5feb\u67e5\u8a62\u901f\u5ea6\u3002<\/li>\n<li>\u907f\u514d\u4f7f\u7528SELECT *\uff1a\u53ea\u9078\u64c7\u9700\u8981\u7684\u5217\uff0c\u6e1b\u5c11\u6578\u64da\u50b3\u8f38\u91cf\u3002<\/li>\n<li>\u4f7f\u7528JOIN\u800c\u4e0d\u662f\u5b50\u67e5\u8a62\uff1a\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0cJOIN\u64cd\u4f5c\u6bd4\u5b50\u67e5\u8a62\u66f4\u9ad8\u6548\u3002<\/li>\n<\/ul>\n<h3 id=\"3-%e5%88%86%e6%89%b9%e8%99%95%e7%90%86%e6%95%b8%e6%93%9a-QRSsFCanuY\">3. \u5206\u6279\u8655\u7406\u6578\u64da<\/h3>\n<p>\u5728\u8655\u7406\u5927\u91cf\u6578\u64da\u6642\uff0c\u5c07\u64cd\u4f5c\u5206\u6279\u57f7\u884c\u53ef\u4ee5\u6709\u6548\u6e1b\u5c11\u963b\u585e\u3002\u4f8b\u5982\uff0c\u5728\u66f4\u65b0\u6216\u63d2\u5165\u5927\u91cf\u8a18\u9304\u6642\uff0c\u53ef\u4ee5\u5c07\u64cd\u4f5c\u5206\u6210\u591a\u500b\u5c0f\u6279\u6b21\u9032\u884c\uff0c\u9019\u6a23\u53ef\u4ee5\u6e1b\u5c11\u6bcf\u6b21\u64cd\u4f5c\u6240\u9700\u7684\u9396\u5b9a\u6642\u9593\u3002<\/p>\n<pre><code>DECLARE @BatchSize INT = 1000;\nWHILE (1=1)\nBEGIN\n    UPDATE TOP (@BatchSize) YourTable\n    SET YourColumn = YourValue\n    WHERE YourCondition;\n\n    IF @@ROWCOUNT = 0 BREAK;\nEND;<\/code><\/pre>\n<h3 id=\"4-%e4%bd%bf%e7%94%a8%e9%9d%9e%e9%8e%96%e5%ae%9a%e8%ae%80%e5%8f%96-QRSsFCanuY\">4. \u4f7f\u7528\u975e\u9396\u5b9a\u8b80\u53d6<\/h3>\n<p>\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0c\u53ef\u4ee5\u4f7f\u7528\u975e\u9396\u5b9a\u8b80\u53d6\u4f86\u907f\u514d\u963b\u585e\u3002\u9019\u53ef\u4ee5\u901a\u904e\u4f7f\u7528\u201cWITH (NOLOCK)\u201d\u63d0\u793a\u4f86\u5be6\u73fe\uff0c\u9019\u6a23\u53ef\u4ee5\u5728\u8b80\u53d6\u6578\u64da\u6642\u4e0d\u6703\u7372\u53d6\u9396\u5b9a\u3002<\/p>\n<pre><code>SELECT * FROM YourTable WITH (NOLOCK) WHERE YourCondition;<\/code><\/pre>\n<h3 id=\"5-%e7%9b%a3%e6%8e%a7%e5%92%8c%e8%aa%bf%e6%95%b4-QRSsFCanuY\">5. \u76e3\u63a7\u548c\u8abf\u6574<\/h3>\n<p>\u5b9a\u671f\u76e3\u63a7SQL Server\u7684\u6027\u80fd\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\u6aa2\u67e5\u7576\u524d\u7684\u963b\u585e\u60c5\u6cc1\uff0c\u4e26\u6839\u64da\u9700\u8981\u8abf\u6574\u61c9\u7528\u7a0b\u5e8f\u7684\u8a2d\u8a08\u3002<\/p>\n<pre><code>SELECT * FROM sys.dm_exec_requests WHERE blocking_session_id  0;<\/code><\/pre>\n<h2 id=\"%e7%b5%90%e8%ab%96-QRSsFCanuY\">\u7d50\u8ad6<\/h2>\n<p>\u901a\u904e\u5408\u7406\u7684\u61c9\u7528\u7a0b\u5e8f\u8a2d\u8a08\u548c\u512a\u5316\uff0c\u53ef\u4ee5\u6709\u6548\u907f\u514dSQL Server\u7684\u963b\u585e\u554f\u984c\u3002\u9078\u64c7\u5408\u9069\u7684\u9694\u96e2\u7d1a\u5225\u3001\u512a\u5316\u67e5\u8a62\u3001\u5206\u6279\u8655\u7406\u6578\u64da\u3001\u4f7f\u7528\u975e\u9396\u5b9a\u8b80\u53d6\u4ee5\u53ca\u5b9a\u671f\u76e3\u63a7\u6027\u80fd\uff0c\u90fd\u662f\u6e1b\u5c11\u963b\u585e\u7684\u91cd\u8981\u7b56\u7565\u3002\u9019\u4e0d\u50c5\u80fd\u63d0\u9ad8\u61c9\u7528\u7a0b\u5e8f\u7684\u6027\u80fd\uff0c\u9084\u80fd\u6539\u5584\u7528\u6236\u9ad4\u9a57\u3002<\/p>\n<p>\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684\u89e3\u6c7a\u65b9\u6848\u4f86\u652f\u6301\u60a8\u7684\u61c9\u7528\u7a0b\u5e8f\uff0c\u8003\u616e\u4f7f\u7528<a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a>\u6216<a href=\"https:\/\/server.hk\">\u4e91\u670d\u52a1\u5668<\/a>\uff0c\u4ee5\u78ba\u4fdd\u60a8\u7684\u6578\u64da\u5eab\u904b\u884c\u6d41\u66a2\uff0c\u4e26\u80fd\u5920\u61c9\u5c0d\u9ad8\u4e26\u767c\u7684\u6311\u6230\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5b78\u7fd2\u5982\u4f55\u901a\u904e\u61c9\u7528\u7a0b\u5e8f\u8a2d\u8a08\u4f86\u907f\u514dSQL Server\u963b\u585e\uff0c\u63d0\u9ad8\u6027\u80fd\u548c\u7528\u6236\u9ad4\u9a57\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-152087","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/152087","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=152087"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/152087\/revisions"}],"predecessor-version":[{"id":152088,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/152087\/revisions\/152088"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=152087"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=152087"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=152087"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}