{"id":138235,"date":"2024-10-31T13:17:22","date_gmt":"2024-10-31T05:17:22","guid":{"rendered":"https:\/\/server.hk\/cnblog\/138235\/"},"modified":"2024-10-31T13:17:23","modified_gmt":"2024-10-31T05:17:23","slug":"sql-server%e8%ac%82%e8%a9%9e%e7%9f%ad%e8%aa%9e%e7%9a%84%e4%bd%bf%e7%94%a8%e8%88%87%e6%87%89%e7%94%a8%ef%bc%88sqlserver%e8%ac%82%e8%a9%9e%ef%bc%89","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/138235\/","title":{"rendered":"SQL Server\u8b02\u8a5e\u77ed\u8a9e\u7684\u4f7f\u7528\u8207\u61c9\u7528\uff08sqlserver\u8b02\u8a5e\uff09"},"content":{"rendered":"<h1 id=\"sql-server%e8%ac%82%e8%a9%9e%e7%9f%ad%e8%aa%9e%e7%9a%84%e4%bd%bf%e7%94%a8%e8%88%87%e6%87%89%e7%94%a8-OWLCavJioo\">SQL Server\u8b02\u8a5e\u77ed\u8a9e\u7684\u4f7f\u7528\u8207\u61c9\u7528<\/h1>\n<p>\u5728\u8cc7\u6599\u5eab\u7ba1\u7406\u7cfb\u7d71\u4e2d\uff0cSQL Server\u662f\u4e00\u500b\u5ee3\u6cdb\u4f7f\u7528\u7684\u95dc\u806f\u5f0f\u8cc7\u6599\u5eab\u7ba1\u7406\u7cfb\u7d71\u3002\u5b83\u63d0\u4f9b\u4e86\u591a\u7a2e\u529f\u80fd\u4f86\u8655\u7406\u548c\u67e5\u8a62\u8cc7\u6599\uff0c\u5176\u4e2d\u8b02\u8a5e\u77ed\u8a9e\uff08Predicate Phrase\uff09\u662fSQL\u67e5\u8a62\u4e2d\u4e0d\u53ef\u6216\u7f3a\u7684\u4e00\u90e8\u5206\u3002\u8b02\u8a5e\u77ed\u8a9e\u4e3b\u8981\u7528\u65bc\u904e\u6ffe\u67e5\u8a62\u7d50\u679c\uff0c\u78ba\u4fdd\u5f9e\u8cc7\u6599\u5eab\u4e2d\u6aa2\u7d22\u5230\u7684\u8cc7\u6599\u7b26\u5408\u7279\u5b9a\u689d\u4ef6\u3002<\/p>\n<h2 id=\"%e8%ac%82%e8%a9%9e%e7%9f%ad%e8%aa%9e%e7%9a%84%e5%9f%ba%e6%9c%ac%e6%a6%82%e5%bf%b5-OWLCavJioo\">\u8b02\u8a5e\u77ed\u8a9e\u7684\u57fa\u672c\u6982\u5ff5<\/h2>\n<p>\u8b02\u8a5e\u77ed\u8a9e\u662fSQL\u67e5\u8a62\u4e2d\u7528\u4f86\u63cf\u8ff0\u689d\u4ef6\u7684\u90e8\u5206\uff0c\u901a\u5e38\u51fa\u73fe\u5728WHERE\u5b50\u53e5\u4e2d\u3002\u5b83\u7531\u4e00\u500b\u6216\u591a\u500b\u689d\u4ef6\u7d44\u6210\uff0c\u9019\u4e9b\u689d\u4ef6\u53ef\u4ee5\u662f\u6bd4\u8f03\u904b\u7b97\u7b26\uff08\u5982=\u3001&gt;\u3001&lt;\u3001!=\u7b49\uff09\u6216\u908f\u8f2f\u904b\u7b97\u7b26\uff08\u5982AND\u3001OR\u3001NOT\u7b49\uff09\u3002\u8b02\u8a5e\u77ed\u8a9e\u7684\u4e3b\u8981\u76ee\u7684\u662f\u9650\u5236\u67e5\u8a62\u7d50\u679c\u96c6\uff0c\u5f9e\u800c\u63d0\u9ad8\u67e5\u8a62\u6548\u7387\u3002<\/p>\n<h3 id=\"%e8%ac%82%e8%a9%9e%e7%9f%ad%e8%aa%9e%e7%9a%84%e7%b5%90%e6%a7%8b-OWLCavJioo\">\u8b02\u8a5e\u77ed\u8a9e\u7684\u7d50\u69cb<\/h3>\n<p>\u8b02\u8a5e\u77ed\u8a9e\u7684\u57fa\u672c\u7d50\u69cb\u5982\u4e0b\uff1a<\/p>\n<pre><code>SELECT column1, column2\nFROM table_name\nWHERE condition;<\/code><\/pre>\n<p>\u5728\u9019\u88e1\uff0ccondition\u5c31\u662f\u8b02\u8a5e\u77ed\u8a9e\u7684\u90e8\u5206\u3002\u4ee5\u4e0b\u662f\u4e00\u4e9b\u5e38\u898b\u7684\u8b02\u8a5e\u77ed\u8a9e\u793a\u4f8b\uff1a<\/p>\n<ul>\n<li><code>WHERE age &gt; 30<\/code>\uff1a\u9078\u64c7\u5e74\u9f61\u5927\u65bc30\u7684\u8a18\u9304\u3002<\/li>\n<li><code>WHERE name = 'John'<\/code>\uff1a\u9078\u64c7\u540d\u5b57\u70baJohn\u7684\u8a18\u9304\u3002<\/li>\n<li><code>WHERE salary &lt; 50000 AND department = 'Sales'<\/code>\uff1a\u9078\u64c7\u85aa\u6c34\u4f4e\u65bc50000\u4e14\u90e8\u9580\u70baSales\u7684\u8a18\u9304\u3002<\/li>\n<\/ul>\n<h2 id=\"%e8%ac%82%e8%a9%9e%e7%9f%ad%e8%aa%9e%e7%9a%84%e6%87%89%e7%94%a8-OWLCavJioo\">\u8b02\u8a5e\u77ed\u8a9e\u7684\u61c9\u7528<\/h2>\n<p>\u8b02\u8a5e\u77ed\u8a9e\u5728\u5be6\u969b\u61c9\u7528\u4e2d\u975e\u5e38\u91cd\u8981\uff0c\u4ee5\u4e0b\u662f\u5e7e\u500b\u5e38\u898b\u7684\u61c9\u7528\u5834\u666f\uff1a<\/p>\n<h3 id=\"1-%e6%95%b8%e6%93%9a%e9%81%8e%e6%bf%be-OWLCavJioo\">1. \u6578\u64da\u904e\u6ffe<\/h3>\n<p>\u8b02\u8a5e\u77ed\u8a9e\u6700\u5e38\u898b\u7684\u7528\u9014\u662f\u904e\u6ffe\u6578\u64da\u3002\u4f8b\u5982\uff0c\u7576\u9700\u8981\u5f9e\u4e00\u500b\u5927\u578b\u8cc7\u6599\u96c6\u4e2d\u63d0\u53d6\u7279\u5b9a\u689d\u4ef6\u7684\u6578\u64da\u6642\uff0c\u8b02\u8a5e\u77ed\u8a9e\u53ef\u4ee5\u5e6b\u52a9\u6211\u5011\u5feb\u901f\u5b9a\u4f4d\u6240\u9700\u7684\u8cc7\u6599\u3002<\/p>\n<pre><code>SELECT * \nFROM Employees \nWHERE HireDate &gt; '2020-01-01';<\/code><\/pre>\n<p>\u9019\u689d\u67e5\u8a62\u5c07\u8fd4\u56de\u6240\u6709\u57282020\u5e741\u67081\u65e5\u4e4b\u5f8c\u88ab\u96c7\u7528\u7684\u54e1\u5de5\u8cc7\u6599\u3002<\/p>\n<h3 id=\"2-%e6%95%b8%e6%93%9a%e6%8e%92%e5%ba%8f-OWLCavJioo\">2. \u6578\u64da\u6392\u5e8f<\/h3>\n<p>\u96d6\u7136\u8b02\u8a5e\u77ed\u8a9e\u4e3b\u8981\u7528\u65bc\u904e\u6ffe\u6578\u64da\uff0c\u4f46\u5b83\u4e5f\u53ef\u4ee5\u8207ORDER BY\u5b50\u53e5\u7d50\u5408\u4f7f\u7528\uff0c\u4ee5\u4fbf\u5728\u67e5\u8a62\u7d50\u679c\u4e2d\u9032\u884c\u6392\u5e8f\u3002<\/p>\n<pre><code>SELECT * \nFROM Products \nWHERE Price &lt; 100 \nORDER BY Price ASC;<\/code><\/pre>\n<p>\u9019\u689d\u67e5\u8a62\u5c07\u8fd4\u56de\u6240\u6709\u50f9\u683c\u4f4e\u65bc100\u7684\u7522\u54c1\uff0c\u4e26\u6309\u50f9\u683c\u5347\u5e8f\u6392\u5217\u3002<\/p>\n<h3 id=\"3-%e7%b5%84%e5%90%88%e6%9f%a5%e8%a9%a2-OWLCavJioo\">3. \u7d44\u5408\u67e5\u8a62<\/h3>\n<p>\u8b02\u8a5e\u77ed\u8a9e\u9084\u53ef\u4ee5\u8207GROUP BY\u5b50\u53e5\u7d50\u5408\u4f7f\u7528\uff0c\u4ee5\u4fbf\u5c0d\u6578\u64da\u9032\u884c\u5206\u7d44\u548c\u805a\u5408\u3002<\/p>\n<pre><code>SELECT Department, COUNT(*) AS EmployeeCount \nFROM Employees \nWHERE Salary &gt; 30000 \nGROUP BY Department;<\/code><\/pre>\n<p>\u9019\u689d\u67e5\u8a62\u5c07\u8fd4\u56de\u85aa\u6c34\u9ad8\u65bc30000\u7684\u54e1\u5de5\u6578\u91cf\uff0c\u4e26\u6309\u90e8\u9580\u9032\u884c\u5206\u7d44\u3002<\/p>\n<h2 id=\"%e6%9c%80%e4%bd%b3%e5%af%a6%e8%b8%90-OWLCavJioo\">\u6700\u4f73\u5be6\u8e10<\/h2>\n<p>\u5728\u4f7f\u7528\u8b02\u8a5e\u77ed\u8a9e\u6642\uff0c\u9075\u5faa\u4e00\u4e9b\u6700\u4f73\u5be6\u8e10\u53ef\u4ee5\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\u548c\u53ef\u8b80\u6027\uff1a<\/p>\n<ul>\n<li>\u76e1\u91cf\u4f7f\u7528\u7d22\u5f15\uff1a\u5728\u8b02\u8a5e\u77ed\u8a9e\u4e2d\u4f7f\u7528\u7d22\u5f15\u5217\u53ef\u4ee5\u986f\u8457\u63d0\u9ad8\u67e5\u8a62\u6027\u80fd\u3002<\/li>\n<li>\u907f\u514d\u4f7f\u7528\u901a\u914d\u7b26\uff1a\u5728LIKE\u904b\u7b97\u7b26\u4e2d\uff0c\u907f\u514d\u5728\u958b\u982d\u4f7f\u7528\u901a\u914d\u7b26\uff0c\u9019\u6a23\u53ef\u4ee5\u63d0\u9ad8\u67e5\u8a62\u6548\u7387\u3002<\/li>\n<li>\u7c21\u5316\u689d\u4ef6\uff1a\u5c07\u8907\u96dc\u7684\u689d\u4ef6\u7c21\u5316\u70ba\u591a\u500b\u7c21\u55ae\u7684\u689d\u4ef6\uff0c\u9019\u6a23\u53ef\u4ee5\u63d0\u9ad8\u53ef\u8b80\u6027\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-OWLCavJioo\">\u7e3d\u7d50<\/h2>\n<p>SQL Server\u7684\u8b02\u8a5e\u77ed\u8a9e\u662f\u67e5\u8a62\u4e2d\u4e0d\u53ef\u6216\u7f3a\u7684\u90e8\u5206\uff0c\u80fd\u5920\u6709\u6548\u5730\u904e\u6ffe\u548c\u6392\u5e8f\u6578\u64da\u3002\u901a\u904e\u5408\u7406\u4f7f\u7528\u8b02\u8a5e\u77ed\u8a9e\uff0c\u958b\u767c\u8005\u53ef\u4ee5\u63d0\u9ad8\u67e5\u8a62\u7684\u6548\u7387\u548c\u53ef\u8b80\u6027\u3002\u7121\u8ad6\u662f\u5728\u6578\u64da\u904e\u6ffe\u3001\u6392\u5e8f\u9084\u662f\u7d44\u5408\u67e5\u8a62\u4e2d\uff0c\u8b02\u8a5e\u77ed\u8a9e\u90fd\u626e\u6f14\u8457\u91cd\u8981\u7684\u89d2\u8272\u3002\u5c0d\u65bc\u9700\u8981\u9ad8\u6548\u6578\u64da\u8655\u7406\u7684\u4f01\u696d\u4f86\u8aaa\uff0c\u9078\u64c7\u5408\u9069\u7684<code><a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a><\/code>\u6216<code><a href=\"https:\/\/server.hk\">\u96f2\u4f3a\u670d\u5668<\/a><\/code>\u89e3\u6c7a\u65b9\u6848\uff0c\u53ef\u4ee5\u9032\u4e00\u6b65\u63d0\u5347SQL Server\u7684\u6027\u80fd\u548c\u7a69\u5b9a\u6027\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u63a2\u7d22SQL Server\u8b02\u8a5e\u77ed\u8a9e\u7684\u4f7f\u7528\u8207\u61c9\u7528\uff0c\u63d0\u5347\u67e5\u8a62\u6548\u7387\uff0c\u512a\u5316\u6578\u64da\u8655\u7406\uff0c\u638c\u63e1SQL\u8a9e\u8a00\u7684\u95dc\u9375\u6280\u5de7\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-138235","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/138235","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=138235"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/138235\/revisions"}],"predecessor-version":[{"id":138236,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/138235\/revisions\/138236"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=138235"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=138235"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=138235"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}