{"id":143865,"date":"2024-11-01T01:54:20","date_gmt":"2024-10-31T17:54:20","guid":{"rendered":"https:\/\/server.hk\/cnblog\/143865\/"},"modified":"2024-11-01T01:54:21","modified_gmt":"2024-10-31T17:54:21","slug":"sql-%e6%8e%92%e5%ba%8f%e6%95%99%e7%a8%8b%ef%bc%9a%e8%ae%93%e4%bd%a0%e8%bc%95%e9%ac%86%e6%8e%8c%e6%8f%a1%e6%95%b8%e6%93%9a%e5%ba%ab%e8%aa%9e%e5%8f%a5%e5%8d%87%e5%ba%8f%e6%8e%92%e5%88%97%e6%8a%80","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/143865\/","title":{"rendered":"SQL \u6392\u5e8f\u6559\u7a0b\uff1a\u8b93\u4f60\u8f15\u9b06\u638c\u63e1\u6578\u64da\u5eab\u8a9e\u53e5\u5347\u5e8f\u6392\u5217\u6280\u5de7 (\u6578\u64da\u5eab\u8a9e\u53e5\u5347\u5e8f\u6392\u5217)"},"content":{"rendered":"<h1 id=\"sql-%e6%8e%92%e5%ba%8f%e6%95%99%e7%a8%8b%ef%bc%9a%e8%ae%93%e4%bd%a0%e8%bc%95%e9%ac%86%e6%8e%8c%e6%8f%a1%e6%95%b8%e6%93%9a%e5%ba%ab%e8%aa%9e%e5%8f%a5%e5%8d%87%e5%ba%8f%e6%8e%92%e5%88%97%e6%8a%80-hXRdEJrQdW\">SQL \u6392\u5e8f\u6559\u7a0b\uff1a\u8b93\u4f60\u8f15\u9b06\u638c\u63e1\u6578\u64da\u5eab\u8a9e\u53e5\u5347\u5e8f\u6392\u5217\u6280\u5de7<\/h1>\n<p>\u5728\u6578\u64da\u5eab\u7ba1\u7406\u4e2d\uff0c\u6392\u5e8f\u662f\u4e00\u500b\u975e\u5e38\u91cd\u8981\u7684\u64cd\u4f5c\u3002\u7121\u8ad6\u662f\u67e5\u8a62\u7d50\u679c\u7684\u53ef\u8b80\u6027\uff0c\u9084\u662f\u6578\u64da\u5206\u6790\u7684\u6e96\u78ba\u6027\uff0c\u6392\u5e8f\u90fd\u626e\u6f14\u8457\u95dc\u9375\u89d2\u8272\u3002\u672c\u6587\u5c07\u6df1\u5165\u63a2\u8a0e\u5982\u4f55\u4f7f\u7528 SQL \u8a9e\u53e5\u9032\u884c\u5347\u5e8f\u6392\u5217\uff0c\u5e6b\u52a9\u4f60\u8f15\u9b06\u638c\u63e1\u9019\u4e00\u6280\u5de7\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%af-sql-%e6%8e%92%e5%ba%8f%ef%bc%9f-hXRdEJrQdW\">\u4ec0\u9ebc\u662f SQL \u6392\u5e8f\uff1f<\/h2>\n<p>SQL\uff08\u7d50\u69cb\u5316\u67e5\u8a62\u8a9e\u8a00\uff09\u662f\u4e00\u7a2e\u7528\u65bc\u7ba1\u7406\u548c\u64cd\u4f5c\u95dc\u4fc2\u578b\u6578\u64da\u5eab\u7684\u6a19\u6e96\u8a9e\u8a00\u3002\u6392\u5e8f\u662f SQL \u4e2d\u7684\u4e00\u500b\u57fa\u672c\u529f\u80fd\uff0c\u5141\u8a31\u7528\u6236\u6839\u64da\u7279\u5b9a\u7684\u5217\u5c0d\u67e5\u8a62\u7d50\u679c\u9032\u884c\u6392\u5e8f\u3002\u5347\u5e8f\u6392\u5217\u662f\u6700\u5e38\u898b\u7684\u6392\u5e8f\u65b9\u5f0f\uff0c\u6578\u64da\u5c07\u5f9e\u5c0f\u5230\u5927\u6392\u5217\u3002<\/p>\n<h2 id=\"%e4%bd%bf%e7%94%a8-order-by-%e5%ad%90%e5%8f%a5%e9%80%b2%e8%a1%8c%e5%8d%87%e5%ba%8f%e6%8e%92%e5%88%97-hXRdEJrQdW\">\u4f7f\u7528 ORDER BY \u5b50\u53e5\u9032\u884c\u5347\u5e8f\u6392\u5217<\/h2>\n<p>\u5728 SQL \u4e2d\uff0c\u4f7f\u7528 <code>ORDER BY<\/code> \u5b50\u53e5\u4f86\u9032\u884c\u6392\u5e8f\u3002\u57fa\u672c\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>SELECT column1, column2, ...\nFROM table_name\nORDER BY column1 [ASC|DESC];<\/code><\/pre>\n<p>\u5728\u9019\u88e1\uff0c<code>ASC<\/code> \u8868\u793a\u5347\u5e8f\u6392\u5217\uff0c\u800c <code>DESC<\/code> \u5247\u8868\u793a\u964d\u5e8f\u6392\u5217\u3002\u9ed8\u8a8d\u60c5\u6cc1\u4e0b\uff0c<code>ORDER BY<\/code> \u4f7f\u7528\u5347\u5e8f\u6392\u5217\u3002<\/p>\n<h3 id=\"%e7%af%84%e4%be%8b%ef%bc%9a%e5%8d%87%e5%ba%8f%e6%8e%92%e5%88%97-hXRdEJrQdW\">\u7bc4\u4f8b\uff1a\u5347\u5e8f\u6392\u5217<\/h3>\n<p>\u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b\u540d\u70ba <code>employees<\/code> \u7684\u8868\uff0c\u5305\u542b\u4ee5\u4e0b\u6578\u64da\uff1a<\/p>\n<pre><code>+----+-------+--------+\n| ID | Name  | Salary |\n+----+-------+--------+\n| 1  | Alice | 5000   |\n| 2  | Bob   | 3000   |\n| 3  | Carol | 7000   |\n| 4  | Dave  | 4000   |\n+----+-------+--------+<\/code><\/pre>\n<p>\u5982\u679c\u6211\u5011\u60f3\u6839\u64da\u85aa\u6c34\u9032\u884c\u5347\u5e8f\u6392\u5217\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b SQL \u8a9e\u53e5\uff1a<\/p>\n<pre><code>SELECT * FROM employees\nORDER BY Salary ASC;<\/code><\/pre>\n<p>\u57f7\u884c\u5f8c\u7684\u7d50\u679c\u5c07\u662f\uff1a<\/p>\n<pre><code>+----+-------+--------+\n| ID | Name  | Salary |\n+----+-------+--------+\n| 2  | Bob   | 3000   |\n| 4  | Dave  | 4000   |\n| 1  | Alice | 5000   |\n| 3  | Carol | 7000   |\n+----+-------+--------+<\/code><\/pre>\n<h2 id=\"%e5%a4%9a%e5%88%97%e6%8e%92%e5%ba%8f-hXRdEJrQdW\">\u591a\u5217\u6392\u5e8f<\/h2>\n<p>\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0c\u6211\u5011\u53ef\u80fd\u9700\u8981\u6839\u64da\u591a\u500b\u5217\u9032\u884c\u6392\u5e8f\u3002\u9019\u53ef\u4ee5\u901a\u904e\u5728 <code>ORDER BY<\/code> \u5b50\u53e5\u4e2d\u5217\u51fa\u591a\u500b\u5217\u4f86\u5be6\u73fe\u3002\u4f8b\u5982\uff0c\u5982\u679c\u6211\u5011\u5e0c\u671b\u9996\u5148\u6839\u64da\u85aa\u6c34\u5347\u5e8f\u6392\u5217\uff0c\u7136\u5f8c\u6839\u64da\u59d3\u540d\u7684\u5b57\u6bcd\u9806\u5e8f\u6392\u5217\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u8a9e\u53e5\uff1a<\/p>\n<pre><code>SELECT * FROM employees\nORDER BY Salary ASC, Name ASC;<\/code><\/pre>\n<p>\u9019\u6a23\uff0c\u7d50\u679c\u5c07\u9996\u5148\u6839\u64da\u85aa\u6c34\u9032\u884c\u6392\u5e8f\uff0c\u7136\u5f8c\u5728\u85aa\u6c34\u76f8\u540c\u7684\u60c5\u6cc1\u4e0b\uff0c\u6839\u64da\u59d3\u540d\u9032\u884c\u6392\u5e8f\u3002<\/p>\n<h2 id=\"%e6%b3%a8%e6%84%8f%e4%ba%8b%e9%a0%85-hXRdEJrQdW\">\u6ce8\u610f\u4e8b\u9805<\/h2>\n<ul>\n<li>\u5728\u4f7f\u7528 <code>ORDER BY<\/code> \u6642\uff0c\u78ba\u4fdd\u6240\u9078\u5217\u5b58\u5728\u65bc\u67e5\u8a62\u7684 <code>SELECT<\/code> \u8a9e\u53e5\u4e2d\u3002<\/li>\n<li>\u5347\u5e8f\u6392\u5217\u662f\u9ed8\u8a8d\u9078\u9805\uff0c\u56e0\u6b64\u53ef\u4ee5\u7701\u7565 <code>ASC<\/code>\u3002<\/li>\n<li>\u5c0d\u65bc\u5927\u578b\u6578\u64da\u96c6\uff0c\u6392\u5e8f\u64cd\u4f5c\u53ef\u80fd\u6703\u5f71\u97ff\u6027\u80fd\uff0c\u5efa\u8b70\u5728\u5fc5\u8981\u6642\u4f7f\u7528\u7d22\u5f15\u4f86\u63d0\u9ad8\u67e5\u8a62\u6548\u7387\u3002<\/li>\n<\/ul>\n<h2 id=\"%e7%b8%bd%e7%b5%90-hXRdEJrQdW\">\u7e3d\u7d50<\/h2>\n<p>\u638c\u63e1 SQL \u7684\u5347\u5e8f\u6392\u5217\u6280\u5de7\u5c0d\u65bc\u6578\u64da\u5eab\u7ba1\u7406\u548c\u6578\u64da\u5206\u6790\u81f3\u95dc\u91cd\u8981\u3002\u901a\u904e\u4f7f\u7528 <code>ORDER BY<\/code> \u5b50\u53e5\uff0c\u4f60\u53ef\u4ee5\u8f15\u9b06\u5730\u5c0d\u67e5\u8a62\u7d50\u679c\u9032\u884c\u6392\u5e8f\uff0c\u7121\u8ad6\u662f\u55ae\u5217\u9084\u662f\u591a\u5217\u6392\u5e8f\u3002\u9019\u4e0d\u50c5\u63d0\u9ad8\u4e86\u6578\u64da\u7684\u53ef\u8b80\u6027\uff0c\u4e5f\u70ba\u5f8c\u7e8c\u7684\u6578\u64da\u8655\u7406\u63d0\u4f9b\u4e86\u4fbf\u5229\u3002<\/p>\n<p>\u5982\u679c\u4f60\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684 <a href=\"https:\/\/server.hk\">VPS<\/a> \u89e3\u6c7a\u65b9\u6848\u4f86\u652f\u6301\u4f60\u7684\u6578\u64da\u5eab\u64cd\u4f5c\uff0cServer.HK \u63d0\u4f9b\u4e86\u591a\u7a2e\u9078\u64c7\uff0c\u5e6b\u52a9\u4f60\u8f15\u9b06\u7ba1\u7406\u548c\u512a\u5316\u4f60\u7684\u6578\u64da\u5eab\u74b0\u5883\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5b78\u7fd2SQL\u6392\u5e8f\u6280\u5de7\uff0c\u8f15\u9b06\u638c\u63e1\u6578\u64da\u5eab\u8a9e\u53e5\u7684\u5347\u5e8f\u6392\u5217\uff0c\u63d0\u5347\u6578\u64da\u67e5\u8a62\u6548\u7387\uff0c\u8b93\u6578\u64da\u7ba1\u7406\u66f4\u7c21\u55ae\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-143865","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/143865","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=143865"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/143865\/revisions"}],"predecessor-version":[{"id":143866,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/143865\/revisions\/143866"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=143865"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=143865"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=143865"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}