{"id":171585,"date":"2024-11-07T03:58:19","date_gmt":"2024-11-06T19:58:19","guid":{"rendered":"https:\/\/server.hk\/cnblog\/171585\/"},"modified":"2024-11-07T03:58:20","modified_gmt":"2024-11-06T19:58:20","slug":"%e5%b7%a7%e7%94%a8set%e9%81%b8%e9%a0%85%e8%a8%ad%e7%bd%aesql-server%e5%ae%a2%e6%88%b6%e7%ab%af%e9%85%8d%e7%bd%ae","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/171585\/","title":{"rendered":"\u5de7\u7528SET\u9078\u9805\u8a2d\u7f6eSQL Server\u5ba2\u6236\u7aef\u914d\u7f6e"},"content":{"rendered":"<h1 id=\"%e5%b7%a7%e7%94%a8set%e9%81%b8%e9%a0%85%e8%a8%ad%e7%bd%aesql-server%e5%ae%a2%e6%88%b6%e7%ab%af%e9%85%8d%e7%bd%ae-oOclObgVvV\">\u5de7\u7528SET\u9078\u9805\u8a2d\u7f6eSQL Server\u5ba2\u6236\u7aef\u914d\u7f6e<\/h1>\n<p>\u5728\u4f7f\u7528SQL Server\u9032\u884c\u6578\u64da\u5eab\u7ba1\u7406\u548c\u67e5\u8a62\u6642\uff0c\u5ba2\u6236\u7aef\u7684\u914d\u7f6e\u5c0d\u65bc\u6027\u80fd\u548c\u7528\u6236\u9ad4\u9a57\u81f3\u95dc\u91cd\u8981\u3002SQL Server\u63d0\u4f9b\u4e86\u591a\u7a2eSET\u9078\u9805\uff0c\u9019\u4e9b\u9078\u9805\u53ef\u4ee5\u5e6b\u52a9\u7528\u6236\u6839\u64da\u7279\u5b9a\u9700\u6c42\u8abf\u6574\u5ba2\u6236\u7aef\u7684\u884c\u70ba\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5982\u4f55\u5de7\u5999\u5730\u4f7f\u7528\u9019\u4e9bSET\u9078\u9805\u4f86\u512a\u5316SQL Server\u7684\u5ba2\u6236\u7aef\u914d\u7f6e\u3002<\/p>\n<h2 id=\"set%e9%81%b8%e9%a0%85%e6%a6%82%e8%bf%b0-oOclObgVvV\">SET\u9078\u9805\u6982\u8ff0<\/h2>\n<p>SET\u9078\u9805\u662fSQL Server\u4e2d\u7528\u4f86\u63a7\u5236\u6703\u8a71\u5c64\u7d1a\u7684\u884c\u70ba\u7684\u6307\u4ee4\u3002\u9019\u4e9b\u9078\u9805\u53ef\u4ee5\u5f71\u97ff\u67e5\u8a62\u7684\u57f7\u884c\u65b9\u5f0f\u3001\u6578\u64da\u7684\u986f\u793a\u683c\u5f0f\u4ee5\u53ca\u932f\u8aa4\u8655\u7406\u7b49\u3002\u5e38\u898b\u7684SET\u9078\u9805\u5305\u62ec\uff1a<\/p>\n<ul>\n<li><code>SET NOCOUNT<\/code><\/li>\n<li><code>SET ANSI_NULLS<\/code><\/li>\n<li><code>SET ANSI_WARNINGS<\/code><\/li>\n<li><code>SET QUOTED_IDENTIFIER<\/code><\/li>\n<li><code>SET TRANSACTION ISOLATION LEVEL<\/code><\/li>\n<\/ul>\n<h2 id=\"%e5%b8%b8%e7%94%a8set%e9%81%b8%e9%a0%85%e7%9a%84%e8%a9%b3%e7%b4%b0%e8%aa%aa%e6%98%8e-oOclObgVvV\">\u5e38\u7528SET\u9078\u9805\u7684\u8a73\u7d30\u8aaa\u660e<\/h2>\n<h3 id=\"1-set-nocount-oOclObgVvV\">1. SET NOCOUNT<\/h3>\n<p>\u7576\u57f7\u884c\u67e5\u8a62\u6642\uff0cSQL Server\u6703\u8fd4\u56de\u53d7\u5f71\u97ff\u7684\u884c\u6578\u3002\u4f7f\u7528<code>SET NOCOUNT ON<\/code>\u53ef\u4ee5\u9632\u6b62\u9019\u4e9b\u884c\u6578\u7684\u8fd4\u56de\uff0c\u5f9e\u800c\u6e1b\u5c11\u7db2\u7d61\u6d41\u91cf\u548c\u63d0\u9ad8\u6027\u80fd\u3002\u9019\u5728\u57f7\u884c\u5927\u91cf\u63d2\u5165\u6216\u66f4\u65b0\u64cd\u4f5c\u6642\u7279\u5225\u6709\u7528\u3002<\/p>\n<pre><code>SET NOCOUNT ON;\nSELECT * FROM Employees;\nSET NOCOUNT OFF;<\/code><\/pre>\n<h3 id=\"2-set-ansi_nulls-oOclObgVvV\">2. SET ANSI_NULLS<\/h3>\n<p>\u6b64\u9078\u9805\u63a7\u5236\u5982\u4f55\u8655\u7406NULL\u503c\u7684\u6bd4\u8f03\u3002\u7576<code>SET ANSI_NULLS ON<\/code>\u6642\uff0c\u4efb\u4f55\u8207NULL\u7684\u6bd4\u8f03\u90fd\u5c07\u8fd4\u56deFALSE\uff0c\u9019\u7b26\u5408ANSI SQL\u6a19\u6e96\u3002\u9019\u5c0d\u65bc\u78ba\u4fdd\u67e5\u8a62\u7684\u6b63\u78ba\u6027\u81f3\u95dc\u91cd\u8981\u3002<\/p>\n<pre><code>SET ANSI_NULLS ON;\nSELECT * FROM Employees WHERE Name = NULL; -- \u9019\u5c07\u4e0d\u8fd4\u56de\u4efb\u4f55\u7d50\u679c<\/code><\/pre>\n<h3 id=\"3-set-ansi_warnings-oOclObgVvV\">3. SET ANSI_WARNINGS<\/h3>\n<p>\u6b64\u9078\u9805\u63a7\u5236\u5728\u57f7\u884c\u67e5\u8a62\u6642\u662f\u5426\u986f\u793a\u8b66\u544a\u4fe1\u606f\u3002\u7576<code>SET ANSI_WARNINGS ON<\/code>\u6642\uff0cSQL Server\u6703\u5728\u9047\u5230\u6578\u64da\u985e\u578b\u4e0d\u5339\u914d\u6216\u6ea2\u51fa\u6642\u767c\u51fa\u8b66\u544a\u3002\u9019\u6709\u52a9\u65bc\u958b\u767c\u4eba\u54e1\u53ca\u6642\u767c\u73fe\u554f\u984c\u3002<\/p>\n<pre><code>SET ANSI_WARNINGS ON;\nSELECT CAST('abc' AS INT); -- \u5c07\u6703\u5f15\u767c\u8b66\u544a<\/code><\/pre>\n<h3 id=\"4-set-quoted_identifier-oOclObgVvV\">4. SET QUOTED_IDENTIFIER<\/h3>\n<p>\u6b64\u9078\u9805\u6c7a\u5b9a\u5982\u4f55\u8655\u7406\u7528\u96d9\u5f15\u865f\u62ec\u8d77\u7684\u6a19\u8b58\u7b26\u3002\u7576<code>SET QUOTED_IDENTIFIER ON<\/code>\u6642\uff0c\u96d9\u5f15\u865f\u5167\u7684\u6a19\u8b58\u7b26\u53ef\u4ee5\u5305\u542b\u7a7a\u683c\u548c\u4fdd\u7559\u5b57\uff0c\u9019\u5c0d\u65bc\u5275\u5efa\u8907\u96dc\u7684\u67e5\u8a62\u975e\u5e38\u6709\u7528\u3002<\/p>\n<pre><code>SET QUOTED_IDENTIFIER ON;\nSELECT \"First Name\" FROM Employees; -- \u9019\u662f\u5408\u6cd5\u7684<\/code><\/pre>\n<h3 id=\"5-set-transaction-isolation-level-oOclObgVvV\">5. SET TRANSACTION ISOLATION LEVEL<\/h3>\n<p>\u6b64\u9078\u9805\u7528\u65bc\u8a2d\u7f6e\u4e8b\u52d9\u7684\u9694\u96e2\u7d1a\u5225\uff0c\u5f71\u97ff\u6578\u64da\u7684\u53ef\u898b\u6027\u548c\u4e26\u767c\u6027\u3002\u5e38\u898b\u7684\u9694\u96e2\u7d1a\u5225\u5305\u62ecREAD UNCOMMITTED\u3001READ COMMITTED\u3001REPEATABLE READ\u548cSERIALIZABLE\u3002\u9078\u64c7\u5408\u9069\u7684\u9694\u96e2\u7d1a\u5225\u53ef\u4ee5\u63d0\u9ad8\u7cfb\u7d71\u7684\u6027\u80fd\u548c\u6578\u64da\u7684\u4e00\u81f4\u6027\u3002<\/p>\n<pre><code>SET TRANSACTION ISOLATION LEVEL READ COMMITTED;\nSELECT * FROM Employees;<\/code><\/pre>\n<h2 id=\"%e7%b5%90%e8%ab%96-oOclObgVvV\">\u7d50\u8ad6<\/h2>\n<p>\u901a\u904e\u5408\u7406\u4f7f\u7528SQL Server\u7684SET\u9078\u9805\uff0c\u958b\u767c\u4eba\u54e1\u548c\u6578\u64da\u5eab\u7ba1\u7406\u54e1\u53ef\u4ee5\u6709\u6548\u5730\u8abf\u6574\u5ba2\u6236\u7aef\u7684\u884c\u70ba\uff0c\u5f9e\u800c\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\u548c\u6578\u64da\u8655\u7406\u7684\u9748\u6d3b\u6027\u3002\u4e86\u89e3\u9019\u4e9b\u9078\u9805\u7684\u4f7f\u7528\u65b9\u6cd5\u548c\u5f71\u97ff\uff0c\u5c07\u6709\u52a9\u65bc\u5728\u65e5\u5e38\u5de5\u4f5c\u4e2d\u505a\u51fa\u66f4\u660e\u667a\u7684\u6c7a\u7b56\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\u6578\u64da\u5eab\u7ba1\u7406\u9084\u662f\u61c9\u7528\u7a0b\u5e8f\u90e8\u7f72\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\u7d22\u5982\u4f55\u5de7\u5999\u4f7f\u7528SET\u9078\u9805\u8a2d\u7f6eSQL Server\u5ba2\u6236\u7aef\u914d\u7f6e\uff0c\u63d0\u5347\u6578\u64da\u5eab\u6027\u80fd\u8207\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-171585","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/171585","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=171585"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/171585\/revisions"}],"predecessor-version":[{"id":171586,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/171585\/revisions\/171586"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=171585"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=171585"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=171585"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}