{"id":154615,"date":"2024-11-02T17:17:18","date_gmt":"2024-11-02T09:17:18","guid":{"rendered":"https:\/\/server.hk\/cnblog\/154615\/"},"modified":"2024-11-02T17:17:19","modified_gmt":"2024-11-02T09:17:19","slug":"%e5%b0%8d-sql-server-%e6%95%b8%e6%93%9a%e5%ba%ab%e4%b8%ad%e5%85%a9%e5%80%8b%e7%b4%b0%e7%af%80%e7%9a%84%e6%8f%8f%e8%bf%b0","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/154615\/","title":{"rendered":"\u5c0d SQL Server \u6578\u64da\u5eab\u4e2d\u5169\u500b\u7d30\u7bc0\u7684\u63cf\u8ff0"},"content":{"rendered":"<h1 id=\"%e5%b0%8d-sql-server-%e6%95%b8%e6%93%9a%e5%ba%ab%e4%b8%ad%e5%85%a9%e5%80%8b%e7%b4%b0%e7%af%80%e7%9a%84%e6%8f%8f%e8%bf%b0-wrrZXZxfHG\">\u5c0d SQL Server \u6578\u64da\u5eab\u4e2d\u5169\u500b\u7d30\u7bc0\u7684\u63cf\u8ff0<\/h1>\n<p>\u5728\u7576\u4eca\u7684\u6578\u64da\u9a45\u52d5\u4e16\u754c\u4e2d\uff0cSQL Server \u4f5c\u70ba\u4e00\u7a2e\u6d41\u884c\u7684\u95dc\u4fc2\u578b\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\uff0c\u5ee3\u6cdb\u61c9\u7528\u65bc\u5404\u7a2e\u696d\u52d9\u74b0\u5883\u4e2d\u3002\u7121\u8ad6\u662f\u5c0f\u578b\u4f01\u696d\u9084\u662f\u5927\u578b\u4f01\u696d\uff0cSQL Server \u90fd\u63d0\u4f9b\u4e86\u5f37\u5927\u7684\u529f\u80fd\u4f86\u7ba1\u7406\u548c\u64cd\u4f5c\u6578\u64da\u3002\u5728\u9019\u7bc7\u6587\u7ae0\u4e2d\uff0c\u6211\u5011\u5c07\u6df1\u5165\u63a2\u8a0e SQL Server \u4e2d\u7684\u5169\u500b\u91cd\u8981\u7d30\u7bc0\uff1a\u6578\u64da\u5eab\u7684\u7d22\u5f15\u548c\u4e8b\u52d9\u7684\u7ba1\u7406\u3002<\/p>\n<h2 id=\"%e4%b8%80%e3%80%81%e6%95%b8%e6%93%9a%e5%ba%ab%e7%9a%84%e7%b4%a2%e5%bc%95-wrrZXZxfHG\">\u4e00\u3001\u6578\u64da\u5eab\u7684\u7d22\u5f15<\/h2>\n<p>\u7d22\u5f15\u662f SQL Server \u4e2d\u4e00\u500b\u95dc\u9375\u7684\u6027\u80fd\u512a\u5316\u5de5\u5177\u3002\u5b83\u5011\u985e\u4f3c\u65bc\u66f8\u7c4d\u7684\u76ee\u9304\uff0c\u5e6b\u52a9\u6578\u64da\u5eab\u5f15\u64ce\u5feb\u901f\u5b9a\u4f4d\u6240\u9700\u7684\u6578\u64da\u3002\u7d22\u5f15\u53ef\u4ee5\u986f\u8457\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\uff0c\u7279\u5225\u662f\u5728\u8655\u7406\u5927\u91cf\u6578\u64da\u6642\u3002<\/p>\n<h3 id=\"1-1-%e7%b4%a2%e5%bc%95%e7%9a%84%e9%a1%9e%e5%9e%8b-wrrZXZxfHG\">1.1 \u7d22\u5f15\u7684\u985e\u578b<\/h3>\n<ul>\n<li><strong>\u805a\u96c6\u7d22\u5f15\uff08Clustered Index\uff09<\/strong>\uff1a\u805a\u96c6\u7d22\u5f15\u6c7a\u5b9a\u4e86\u6578\u64da\u5728\u78c1\u789f\u4e0a\u7684\u7269\u7406\u5b58\u5132\u9806\u5e8f\u3002\u6bcf\u500b\u8868\u53ea\u80fd\u6709\u4e00\u500b\u805a\u96c6\u7d22\u5f15\uff0c\u901a\u5e38\u7528\u65bc\u4e3b\u9375\u3002<\/li>\n<li><strong>\u975e\u805a\u96c6\u7d22\u5f15\uff08Non-Clustered Index\uff09<\/strong>\uff1a\u975e\u805a\u96c6\u7d22\u5f15\u662f\u7368\u7acb\u65bc\u6578\u64da\u7684\u7d50\u69cb\uff0c\u5141\u8a31\u5728\u8868\u4e2d\u5275\u5efa\u591a\u500b\u7d22\u5f15\u3002\u5b83\u5011\u5305\u542b\u6307\u5411\u6578\u64da\u884c\u7684\u6307\u91dd\uff0c\u9069\u5408\u65bc\u67e5\u8a62\u983b\u7e41\u7684\u5217\u3002<\/li>\n<\/ul>\n<h3 id=\"1-2-%e5%89%b5%e5%bb%ba%e7%b4%a2%e5%bc%95%e7%9a%84%e7%a4%ba%e4%be%8b-wrrZXZxfHG\">1.2 \u5275\u5efa\u7d22\u5f15\u7684\u793a\u4f8b<\/h3>\n<p>\u4ee5\u4e0b\u662f\u5275\u5efa\u975e\u805a\u96c6\u7d22\u5f15\u7684 SQL \u8a9e\u53e5\u793a\u4f8b\uff1a<\/p>\n<pre><code>CREATE NONCLUSTERED INDEX IX_Employee_LastName\nON Employees (LastName);<\/code><\/pre>\n<p>\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c\u6211\u5011\u5728 Employees \u8868\u7684 LastName \u5217\u4e0a\u5275\u5efa\u4e86\u4e00\u500b\u975e\u805a\u96c6\u7d22\u5f15\u3002\u9019\u6a23\u53ef\u4ee5\u52a0\u5feb\u57fa\u65bc LastName \u7684\u67e5\u8a62\u901f\u5ea6\u3002<\/p>\n<h2 id=\"%e4%ba%8c%e3%80%81%e4%ba%8b%e5%8b%99%e7%9a%84%e7%ae%a1%e7%90%86-wrrZXZxfHG\">\u4e8c\u3001\u4e8b\u52d9\u7684\u7ba1\u7406<\/h2>\n<p>\u4e8b\u52d9\u662f SQL Server \u4e2d\u78ba\u4fdd\u6578\u64da\u5b8c\u6574\u6027\u548c\u4e00\u81f4\u6027\u7684\u53e6\u4e00\u500b\u91cd\u8981\u6982\u5ff5\u3002\u4e8b\u52d9\u662f\u4e00\u7d44\u64cd\u4f5c\u7684\u96c6\u5408\uff0c\u9019\u4e9b\u64cd\u4f5c\u8981\u9ebc\u5168\u90e8\u6210\u529f\uff0c\u8981\u9ebc\u5168\u90e8\u5931\u6557\u3002\u9019\u7a2e\u7279\u6027\u88ab\u7a31\u70ba\u539f\u5b50\u6027\uff08Atomicity\uff09\u3002<\/p>\n<h3 id=\"2-1-%e4%ba%8b%e5%8b%99%e7%9a%84%e7%89%b9%e6%80%a7-wrrZXZxfHG\">2.1 \u4e8b\u52d9\u7684\u7279\u6027<\/h3>\n<ul>\n<li><strong>\u539f\u5b50\u6027\uff08Atomicity\uff09<\/strong>\uff1a\u4e8b\u52d9\u4e2d\u7684\u6240\u6709\u64cd\u4f5c\u8981\u9ebc\u5168\u90e8\u57f7\u884c\uff0c\u8981\u9ebc\u5168\u90e8\u4e0d\u57f7\u884c\u3002<\/li>\n<li><strong>\u4e00\u81f4\u6027\uff08Consistency\uff09<\/strong>\uff1a\u4e8b\u52d9\u5fc5\u9808\u4f7f\u6578\u64da\u5f9e\u4e00\u500b\u4e00\u81f4\u7684\u72c0\u614b\u8f49\u8b8a\u5230\u53e6\u4e00\u500b\u4e00\u81f4\u7684\u72c0\u614b\u3002<\/li>\n<li><strong>\u9694\u96e2\u6027\uff08Isolation\uff09<\/strong>\uff1a\u4e8b\u52d9\u7684\u57f7\u884c\u4e0d\u61c9\u53d7\u5230\u5176\u4ed6\u4e8b\u52d9\u7684\u5f71\u97ff\u3002<\/li>\n<li><strong>\u6301\u4e45\u6027\uff08Durability\uff09<\/strong>\uff1a\u4e00\u65e6\u4e8b\u52d9\u63d0\u4ea4\uff0c\u5c0d\u6578\u64da\u7684\u66f4\u6539\u5c07\u6c38\u4e45\u4fdd\u5b58\u3002<\/li>\n<\/ul>\n<h3 id=\"2-2-%e4%ba%8b%e5%8b%99%e7%9a%84%e7%a4%ba%e4%be%8b-wrrZXZxfHG\">2.2 \u4e8b\u52d9\u7684\u793a\u4f8b<\/h3>\n<p>\u4ee5\u4e0b\u662f\u4f7f\u7528 SQL \u8a9e\u53e5\u958b\u59cb\u548c\u63d0\u4ea4\u4e8b\u52d9\u7684\u793a\u4f8b\uff1a<\/p>\n<pre><code>BEGIN TRANSACTION;\n\nUPDATE Accounts\nSET Balance = Balance - 100\nWHERE AccountID = 1;\n\nUPDATE Accounts\nSET Balance = Balance + 100\nWHERE AccountID = 2;\n\nCOMMIT;<\/code><\/pre>\n<p>\u5728\u9019\u500b\u4f8b\u5b50\u4e2d\uff0c\u6211\u5011\u5f9e\u4e00\u500b\u8cec\u6236\u6263\u9664 100 \u5143\uff0c\u4e26\u5c07\u5176\u6dfb\u52a0\u5230\u53e6\u4e00\u500b\u8cec\u6236\u3002\u5982\u679c\u5728\u9019\u500b\u904e\u7a0b\u4e2d\u767c\u751f\u932f\u8aa4\uff0c\u6211\u5011\u53ef\u4ee5\u4f7f\u7528 ROLLBACK \u8a9e\u53e5\u4f86\u64a4\u92b7\u6240\u6709\u64cd\u4f5c\uff0c\u78ba\u4fdd\u6578\u64da\u7684\u4e00\u81f4\u6027\u3002<\/p>\n<h2 id=\"%e7%b8%bd%e7%b5%90-wrrZXZxfHG\">\u7e3d\u7d50<\/h2>\n<p>\u5728 SQL Server \u4e2d\uff0c\u7d22\u5f15\u548c\u4e8b\u52d9\u7ba1\u7406\u662f\u5169\u500b\u81f3\u95dc\u91cd\u8981\u7684\u7d30\u7bc0\uff0c\u5c0d\u65bc\u6578\u64da\u5eab\u7684\u6027\u80fd\u548c\u6578\u64da\u5b8c\u6574\u6027\u6709\u8457\u6df1\u9060\u7684\u5f71\u97ff\u3002\u901a\u904e\u5408\u7406\u5730\u4f7f\u7528\u7d22\u5f15\uff0c\u53ef\u4ee5\u986f\u8457\u63d0\u9ad8\u67e5\u8a62\u6548\u7387\uff0c\u800c\u6709\u6548\u7684\u4e8b\u52d9\u7ba1\u7406\u5247\u78ba\u4fdd\u4e86\u6578\u64da\u7684\u4e00\u81f4\u6027\u548c\u53ef\u9760\u6027\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u6548\u6578\u64da\u8655\u7406\u7684\u4f01\u696d\u4f86\u8aaa\uff0c\u9078\u64c7\u5408\u9069\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> \u89e3\u6c7a\u65b9\u6848\uff0c\u642d\u914d SQL Server \u7684\u4f7f\u7528\uff0c\u5c07\u80fd\u5920\u66f4\u597d\u5730\u6eff\u8db3\u696d\u52d9\u9700\u6c42\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22 SQL Server \u6578\u64da\u5eab\u4e2d\u5169\u500b\u95dc\u9375\u7d30\u7bc0\uff0c\u4e86\u89e3\u5176\u7d50\u69cb\u8207\u6027\u80fd\u512a\u5316\u6280\u5de7\uff0c\u63d0\u5347\u6578\u64da\u7ba1\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-154615","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/154615","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=154615"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/154615\/revisions"}],"predecessor-version":[{"id":154616,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/154615\/revisions\/154616"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=154615"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=154615"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=154615"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}