{"id":64805,"date":"2024-10-14T11:49:54","date_gmt":"2024-10-14T03:49:54","guid":{"rendered":"https:\/\/server.hk\/cnblog\/64805\/"},"modified":"2024-10-14T11:49:54","modified_gmt":"2024-10-14T03:49:54","slug":"mssql-where%e8%aa%9e%e5%8f%a5%e4%bd%bf%e7%94%a8%e6%96%b9%e6%b3%95%e8%a9%b3%e8%a7%a3%ef%bc%88mssql-where%ef%bc%89","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/64805\/","title":{"rendered":"MSSQL WHERE\u8a9e\u53e5\u4f7f\u7528\u65b9\u6cd5\u8a73\u89e3\uff08mssql where\uff09"},"content":{"rendered":"<h1 id=\"mssql-where%e8%aa%9e%e5%8f%a5%e4%bd%bf%e7%94%a8%e6%96%b9%e6%b3%95%e8%a9%b3%e8%a7%a3%ef%bc%88mssql-where%ef%bc%89-iClWMsdLJt\">MSSQL WHERE\u8a9e\u53e5\u4f7f\u7528\u65b9\u6cd5\u8a73\u89e3\uff08mssql where\uff09<\/h1>\n<p>\u5728\u4f7f\u7528Microsoft SQL Server\uff08MSSQL\uff09\u9032\u884c\u6578\u64da\u67e5\u8a62\u6642\uff0c<code>WHERE<\/code>\u8a9e\u53e5\u662f\u4e0d\u53ef\u6216\u7f3a\u7684\u90e8\u5206\u3002\u5b83\u5141\u8a31\u7528\u6236\u6839\u64da\u7279\u5b9a\u689d\u4ef6\u904e\u6ffe\u67e5\u8a62\u7d50\u679c\uff0c\u5f9e\u800c\u7372\u5f97\u66f4\u7cbe\u78ba\u7684\u6578\u64da\u3002\u672c\u6587\u5c07\u8a73\u7d30\u4ecb\u7d39<code>WHERE<\/code>\u8a9e\u53e5\u7684\u4f7f\u7528\u65b9\u6cd5\uff0c\u5305\u62ec\u57fa\u672c\u8a9e\u6cd5\u3001\u5e38\u898b\u64cd\u4f5c\u7b26\u53ca\u5176\u61c9\u7528\u793a\u4f8b\u3002<\/p>\n<h2 id=\"%e5%9f%ba%e6%9c%ac%e8%aa%9e%e6%b3%95-iClWMsdLJt\">\u57fa\u672c\u8a9e\u6cd5<\/h2>\n<p><code>WHERE<\/code>\u8a9e\u53e5\u7684\u57fa\u672c\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>SELECT column1, column2, ...\nFROM table_name\nWHERE condition;<\/code><\/pre>\n<p>\u5728\u9019\u88e1\uff0c<code>condition<\/code>\u662f\u7528\u4f86\u904e\u6ffe\u6578\u64da\u7684\u689d\u4ef6\u3002\u53ea\u6709\u6eff\u8db3\u8a72\u689d\u4ef6\u7684\u8a18\u9304\u624d\u6703\u88ab\u9078\u53d6\u3002<\/p>\n<h2 id=\"%e5%b8%b8%e8%a6%8b%e6%93%8d%e4%bd%9c%e7%ac%a6-iClWMsdLJt\">\u5e38\u898b\u64cd\u4f5c\u7b26<\/h2>\n<p>\u5728<code>WHERE<\/code>\u8a9e\u53e5\u4e2d\uff0c\u53ef\u4ee5\u4f7f\u7528\u591a\u7a2e\u64cd\u4f5c\u7b26\u4f86\u69cb\u5efa\u689d\u4ef6\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5e38\u898b\u7684\u64cd\u4f5c\u7b26\uff1a<\/p>\n<ul>\n<li><code>=<\/code>\uff1a\u7b49\u65bc<\/li>\n<li><code>!=<\/code>\u6216<code><\/code>\uff1a\u4e0d\u7b49\u65bc<\/li>\n<li><code>&gt;<\/code>\uff1a\u5927\u65bc<\/li>\n<li><code>&lt;<\/code>\uff1a\u5c0f\u65bc<\/li>\n<li><code>&gt;=<\/code>\uff1a\u5927\u65bc\u6216\u7b49\u65bc<\/li>\n<li><code>&lt;=<\/code>\uff1a\u5c0f\u65bc\u6216\u7b49\u65bc<\/li>\n<li><code>BETWEEN ... AND ...<\/code>\uff1a\u5728\u7bc4\u570d\u5167<\/li>\n<li><code>LIKE<\/code>\uff1a\u6a21\u7cca\u5339\u914d<\/li>\n<li><code>IN<\/code>\uff1a\u5728\u6307\u5b9a\u7684\u96c6\u5408\u4e2d<\/li>\n<li><code>IS NULL<\/code>\uff1a\u6aa2\u67e5\u7a7a\u503c<\/li>\n<\/ul>\n<h2 id=\"%e4%bd%bf%e7%94%a8%e7%a4%ba%e4%be%8b-iClWMsdLJt\">\u4f7f\u7528\u793a\u4f8b<\/h2>\n<h3 id=\"1-%e5%9f%ba%e6%9c%ac%e6%9f%a5%e8%a9%a2-iClWMsdLJt\">1. \u57fa\u672c\u67e5\u8a62<\/h3>\n<p>\u5047\u8a2d\u6709\u4e00\u500b\u540d\u70ba<code>Employees<\/code>\u7684\u8868\uff0c\u5305\u542b\u54e1\u5de5\u7684\u59d3\u540d\u548c\u5e74\u9f61\u3002\u82e5\u8981\u67e5\u8a62\u5e74\u9f61\u5927\u65bc30\u7684\u54e1\u5de5\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u67e5\u8a62\uff1a<\/p>\n<pre><code>SELECT Name, Age\nFROM Employees\nWHERE Age &gt; 30;<\/code><\/pre>\n<h3 id=\"2-%e4%bd%bf%e7%94%a8like%e9%80%b2%e8%a1%8c%e6%a8%a1%e7%b3%8a%e6%9f%a5%e8%a9%a2-iClWMsdLJt\">2. \u4f7f\u7528LIKE\u9032\u884c\u6a21\u7cca\u67e5\u8a62<\/h3>\n<p>\u5982\u679c\u60f3\u67e5\u8a62\u59d3\u540d\u4e2d\u5305\u542b\u201cJohn\u201d\u7684\u54e1\u5de5\uff0c\u53ef\u4ee5\u4f7f\u7528<code>LIKE<\/code>\u64cd\u4f5c\u7b26\uff1a<\/p>\n<pre><code>SELECT Name, Age\nFROM Employees\nWHERE Name LIKE '%John%';<\/code><\/pre>\n<h3 id=\"3-%e4%bd%bf%e7%94%a8between%e9%80%b2%e8%a1%8c%e7%af%84%e5%9c%8d%e6%9f%a5%e8%a9%a2-iClWMsdLJt\">3. \u4f7f\u7528BETWEEN\u9032\u884c\u7bc4\u570d\u67e5\u8a62<\/h3>\n<p>\u82e5\u8981\u67e5\u8a62\u5e74\u9f61\u572825\u523035\u6b72\u4e4b\u9593\u7684\u54e1\u5de5\uff0c\u53ef\u4ee5\u4f7f\u7528<code>BETWEEN<\/code>\uff1a<\/p>\n<pre><code>SELECT Name, Age\nFROM Employees\nWHERE Age BETWEEN 25 AND 35;<\/code><\/pre>\n<h3 id=\"4-%e4%bd%bf%e7%94%a8in%e6%9f%a5%e8%a9%a2%e7%89%b9%e5%ae%9a%e5%80%bc-iClWMsdLJt\">4. \u4f7f\u7528IN\u67e5\u8a62\u7279\u5b9a\u503c<\/h3>\n<p>\u5982\u679c\u60f3\u67e5\u8a62\u5e74\u9f61\u70ba25\u300130\u621635\u7684\u54e1\u5de5\uff0c\u53ef\u4ee5\u4f7f\u7528<code>IN<\/code>\uff1a<\/p>\n<pre><code>SELECT Name, Age\nFROM Employees\nWHERE Age IN (25, 30, 35);<\/code><\/pre>\n<h3 id=\"5-%e7%b5%84%e5%90%88%e5%a4%9a%e5%80%8b%e6%a2%9d%e4%bb%b6-iClWMsdLJt\">5. \u7d44\u5408\u591a\u500b\u689d\u4ef6<\/h3>\n<p>\u53ef\u4ee5\u4f7f\u7528<code>AND<\/code>\u548c<code>OR<\/code>\u4f86\u7d44\u5408\u591a\u500b\u689d\u4ef6\u3002\u4f8b\u5982\uff0c\u67e5\u8a62\u5e74\u9f61\u5927\u65bc30\u4e14\u59d3\u540d\u4e2d\u5305\u542b\u201cJohn\u201d\u7684\u54e1\u5de5\uff1a<\/p>\n<pre><code>SELECT Name, Age\nFROM Employees\nWHERE Age &gt; 30 AND Name LIKE '%John%';<\/code><\/pre>\n<h2 id=\"%e7%b8%bd%e7%b5%90-iClWMsdLJt\">\u7e3d\u7d50<\/h2>\n<p>\u5728MSSQL\u4e2d\uff0c<code>WHERE<\/code>\u8a9e\u53e5\u662f\u9032\u884c\u6578\u64da\u67e5\u8a62\u7684\u91cd\u8981\u5de5\u5177\u3002\u901a\u904e\u9748\u6d3b\u904b\u7528\u5404\u7a2e\u64cd\u4f5c\u7b26\u548c\u689d\u4ef6\u7d44\u5408\uff0c\u7528\u6236\u53ef\u4ee5\u7cbe\u78ba\u5730\u904e\u6ffe\u51fa\u6240\u9700\u7684\u6578\u64da\u3002\u7121\u8ad6\u662f\u57fa\u672c\u67e5\u8a62\u9084\u662f\u8907\u96dc\u7684\u689d\u4ef6\u7d44\u5408\uff0c<code>WHERE<\/code>\u8a9e\u53e5\u90fd\u80fd\u63d0\u4f9b\u5f37\u5927\u7684\u652f\u6301\u3002<\/p>\n<p>\u5982\u679c\u60a8\u5c0d\u65bc\u6578\u64da\u5eab\u7ba1\u7406\u6216\u5176\u4ed6\u6280\u8853\u9700\u6c42\u6709\u8208\u8da3\uff0c\u8003\u616e\u4f7f\u7528<a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a>\u6216<a href=\"https:\/\/server.hk\">\u9999\u6e2f\u4f3a\u670d\u5668<\/a>\u4f86\u63d0\u5347\u60a8\u7684\u696d\u52d9\u6548\u7387\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u6df1\u5165\u63a2\u8a0eMSSQL WHERE\u8a9e\u53e5\u7684\u4f7f\u7528\u65b9\u6cd5\uff0c\u5b78\u7fd2\u5982\u4f55\u6709\u6548\u7be9\u9078\u6578\u64da\uff0c\u63d0\u5347\u67e5\u8a62\u6548\u7387\u8207\u6e96\u78ba\u6027\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-64805","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/64805","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=64805"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/64805\/revisions"}],"predecessor-version":[{"id":64806,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/64805\/revisions\/64806"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=64805"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=64805"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=64805"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}