{"id":175507,"date":"2024-11-08T06:27:20","date_gmt":"2024-11-07T22:27:20","guid":{"rendered":"https:\/\/server.hk\/cnblog\/175507\/"},"modified":"2024-11-08T06:27:21","modified_gmt":"2024-11-07T22:27:21","slug":"%e5%a6%82%e4%bd%95%e4%bd%bf%e7%94%a8%e6%95%b8%e6%93%9a%e5%ba%ab%e9%80%b2%e8%a1%8c%e7%89%b9%e5%ae%9a%e5%ad%97%e6%ae%b5%e7%af%a9%e9%81%b8%ef%bc%88%e6%95%b8%e6%93%9a%e5%ba%ab%e7%af%a9%e9%81%b8%e5%87%ba","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/175507\/","title":{"rendered":"\u5982\u4f55\u4f7f\u7528\u6578\u64da\u5eab\u9032\u884c\u7279\u5b9a\u5b57\u6bb5\u7be9\u9078\uff08\u6578\u64da\u5eab\u7be9\u9078\u51fa\u7279\u5b9a\u5b57\u6bb5\uff09"},"content":{"rendered":"<h1 id=\"%e5%a6%82%e4%bd%95%e4%bd%bf%e7%94%a8%e6%95%b8%e6%93%9a%e5%ba%ab%e9%80%b2%e8%a1%8c%e7%89%b9%e5%ae%9a%e5%ad%97%e6%ae%b5%e7%af%a9%e9%81%b8%ef%bc%88%e6%95%b8%e6%93%9a%e5%ba%ab%e7%af%a9%e9%81%b8%e5%87%ba-nYxVPydYbi\">\u5982\u4f55\u4f7f\u7528\u6578\u64da\u5eab\u9032\u884c\u7279\u5b9a\u5b57\u6bb5\u7be9\u9078\uff08\u6578\u64da\u5eab\u7be9\u9078\u51fa\u7279\u5b9a\u5b57\u6bb5\uff09<\/h1>\n<p>\u5728\u7576\u4eca\u6578\u64da\u9a45\u52d5\u7684\u4e16\u754c\u4e2d\uff0c\u6578\u64da\u5eab\u7684\u4f7f\u7528\u8b8a\u5f97\u8d8a\u4f86\u8d8a\u666e\u904d\u3002\u7121\u8ad6\u662f\u4f01\u696d\u9084\u662f\u500b\u4eba\uff0c\u6578\u64da\u5eab\u90fd\u80fd\u5e6b\u52a9\u6211\u5011\u6709\u6548\u5730\u5b58\u5132\u548c\u7ba1\u7406\u4fe1\u606f\u3002\u7279\u5b9a\u5b57\u6bb5\u7684\u7be9\u9078\u662f\u6578\u64da\u5eab\u64cd\u4f5c\u4e2d\u4e00\u500b\u91cd\u8981\u7684\u529f\u80fd\uff0c\u80fd\u5920\u5e6b\u52a9\u7528\u6236\u5feb\u901f\u627e\u5230\u6240\u9700\u7684\u4fe1\u606f\u3002\u672c\u6587\u5c07\u63a2\u8a0e\u5982\u4f55\u5728\u6578\u64da\u5eab\u4e2d\u9032\u884c\u7279\u5b9a\u5b57\u6bb5\u7684\u7be9\u9078\uff0c\u4e26\u63d0\u4f9b\u4e00\u4e9b\u5be6\u7528\u7684\u793a\u4f8b\u548c\u4ee3\u78bc\u7247\u6bb5\u3002<\/p>\n<h2 id=\"%e4%bb%80%e9%ba%bc%e6%98%af%e6%95%b8%e6%93%9a%e5%ba%ab%e7%af%a9%e9%81%b8%ef%bc%9f-nYxVPydYbi\">\u4ec0\u9ebc\u662f\u6578\u64da\u5eab\u7be9\u9078\uff1f<\/h2>\n<p>\u6578\u64da\u5eab\u7be9\u9078\u662f\u6307\u5f9e\u6578\u64da\u5eab\u4e2d\u63d0\u53d6\u7b26\u5408\u7279\u5b9a\u689d\u4ef6\u7684\u6578\u64da\u3002\u9019\u4e00\u904e\u7a0b\u901a\u5e38\u6d89\u53ca\u5230\u4f7f\u7528\u67e5\u8a62\u8a9e\u8a00\uff08\u5982SQL\uff09\u4f86\u6307\u5b9a\u7be9\u9078\u689d\u4ef6\u3002\u901a\u904e\u7be9\u9078\uff0c\u4f7f\u7528\u8005\u53ef\u4ee5\u7372\u5f97\u66f4\u7cbe\u78ba\u7684\u6578\u64da\u96c6\uff0c\u5f9e\u800c\u63d0\u9ad8\u6578\u64da\u5206\u6790\u7684\u6548\u7387\u3002<\/p>\n<h2 id=\"%e4%bd%bf%e7%94%a8sql%e9%80%b2%e8%a1%8c%e5%ad%97%e6%ae%b5%e7%af%a9%e9%81%b8-nYxVPydYbi\">\u4f7f\u7528SQL\u9032\u884c\u5b57\u6bb5\u7be9\u9078<\/h2>\n<p>SQL\uff08\u7d50\u69cb\u5316\u67e5\u8a62\u8a9e\u8a00\uff09\u662f\u6700\u5e38\u7528\u7684\u6578\u64da\u5eab\u67e5\u8a62\u8a9e\u8a00\u4e4b\u4e00\u3002\u4f7f\u7528SQL\u9032\u884c\u5b57\u6bb5\u7be9\u9078\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>SELECT<\/code>\u8a9e\u53e5\u7528\u65bc\u6307\u5b9a\u8981\u6aa2\u7d22\u7684\u5b57\u6bb5\uff0c<code>FROM<\/code>\u8a9e\u53e5\u7528\u65bc\u6307\u5b9a\u6578\u64da\u8868\uff0c\u800c<code>WHERE<\/code>\u8a9e\u53e5\u5247\u7528\u65bc\u5b9a\u7fa9\u7be9\u9078\u689d\u4ef6\u3002<\/p>\n<h3 id=\"%e7%af%84%e4%be%8b%ef%bc%9a%e7%af%a9%e9%81%b8%e7%89%b9%e5%ae%9a%e5%ad%97%e6%ae%b5-nYxVPydYbi\">\u7bc4\u4f8b\uff1a\u7be9\u9078\u7279\u5b9a\u5b57\u6bb5<\/h3>\n<p>\u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b\u540d\u70ba<code>employees<\/code>\u7684\u6578\u64da\u8868\uff0c\u5305\u542b\u4ee5\u4e0b\u5b57\u6bb5\uff1a<\/p>\n<ul>\n<li>id<\/li>\n<li>name<\/li>\n<li>department<\/li>\n<li>salary<\/li>\n<\/ul>\n<p>\u5982\u679c\u6211\u5011\u60f3\u8981\u7be9\u9078\u51fa\u6240\u6709\u5728\u201cIT\u201d\u90e8\u9580\u5de5\u4f5c\u7684\u54e1\u5de5\u7684\u59d3\u540d\u548c\u85aa\u6c34\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0bSQL\u67e5\u8a62\uff1a<\/p>\n<pre><code>SELECT name, salary\nFROM employees\nWHERE department = 'IT';<\/code><\/pre>\n<p>\u9019\u689d\u67e5\u8a62\u5c07\u8fd4\u56de\u6240\u6709\u5728\u201cIT\u201d\u90e8\u9580\u5de5\u4f5c\u7684\u54e1\u5de5\u7684\u59d3\u540d\u548c\u85aa\u6c34\u3002<\/p>\n<h2 id=\"%e5%a4%9a%e6%a2%9d%e4%bb%b6%e7%af%a9%e9%81%b8-nYxVPydYbi\">\u591a\u689d\u4ef6\u7be9\u9078<\/h2>\n<p>\u5728\u5be6\u969b\u61c9\u7528\u4e2d\uff0c\u6211\u5011\u7d93\u5e38\u9700\u8981\u6839\u64da\u591a\u500b\u689d\u4ef6\u9032\u884c\u7be9\u9078\u3002\u9019\u53ef\u4ee5\u901a\u904e\u4f7f\u7528<code>AND<\/code>\u548c<code>OR<\/code>\u904b\u7b97\u7b26\u4f86\u5be6\u73fe\u3002\u4f8b\u5982\uff0c\u5982\u679c\u6211\u5011\u60f3\u8981\u7be9\u9078\u51fa\u85aa\u6c34\u9ad8\u65bc50000\u4e14\u90e8\u9580\u70ba\u201cIT\u201d\u7684\u54e1\u5de5\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u67e5\u8a62\uff1a<\/p>\n<pre><code>SELECT name, salary\nFROM employees\nWHERE department = 'IT' AND salary &gt; 50000;<\/code><\/pre>\n<p>\u9019\u6a23\u7684\u67e5\u8a62\u5c07\u8fd4\u56de\u6240\u6709\u7b26\u5408\u9019\u5169\u500b\u689d\u4ef6\u7684\u54e1\u5de5\u3002<\/p>\n<h2 id=\"%e4%bd%bf%e7%94%a8like%e9%80%b2%e8%a1%8c%e6%a8%a1%e7%b3%8a%e6%9f%a5%e8%a9%a2-nYxVPydYbi\">\u4f7f\u7528LIKE\u9032\u884c\u6a21\u7cca\u67e5\u8a62<\/h2>\n<p>\u6709\u6642\u5019\uff0c\u6211\u5011\u53ef\u80fd\u9700\u8981\u9032\u884c\u6a21\u7cca\u67e5\u8a62\uff0c\u4ee5\u4fbf\u627e\u5230\u7b26\u5408\u67d0\u7a2e\u6a21\u5f0f\u7684\u6578\u64da\u3002\u9019\u6642\u53ef\u4ee5\u4f7f\u7528<code>LIKE<\/code>\u904b\u7b97\u7b26\u3002\u4f8b\u5982\uff0c\u5982\u679c\u6211\u5011\u60f3\u8981\u67e5\u627e\u6240\u6709\u59d3\u540d\u4e2d\u5305\u542b\u201cJohn\u201d\u7684\u54e1\u5de5\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0b\u67e5\u8a62\uff1a<\/p>\n<pre><code>SELECT name, department\nFROM employees\nWHERE name LIKE '%John%';<\/code><\/pre>\n<p>\u5728\u9019\u88e1\uff0c<code>%<\/code>\u7b26\u865f\u8868\u793a\u4efb\u610f\u5b57\u7b26\u7684\u4efb\u610f\u6578\u91cf\uff0c\u9019\u6a23\u53ef\u4ee5\u627e\u5230\u6240\u6709\u5305\u542b\u201cJohn\u201d\u7684\u59d3\u540d\u3002<\/p>\n<h2 id=\"%e7%b8%bd%e7%b5%90-nYxVPydYbi\">\u7e3d\u7d50<\/h2>\n<p>\u901a\u904e\u4f7f\u7528SQL\u9032\u884c\u7279\u5b9a\u5b57\u6bb5\u7684\u7be9\u9078\uff0c\u6211\u5011\u53ef\u4ee5\u6709\u6548\u5730\u5f9e\u6578\u64da\u5eab\u4e2d\u63d0\u53d6\u6240\u9700\u7684\u4fe1\u606f\u3002\u7121\u8ad6\u662f\u55ae\u4e00\u689d\u4ef6\u9084\u662f\u591a\u689d\u4ef6\u7be9\u9078\uff0cSQL\u90fd\u63d0\u4f9b\u4e86\u9748\u6d3b\u7684\u67e5\u8a62\u65b9\u5f0f\u4f86\u6eff\u8db3\u4e0d\u540c\u7684\u9700\u6c42\u3002\u638c\u63e1\u9019\u4e9b\u57fa\u672c\u7684\u7be9\u9078\u6280\u5de7\uff0c\u5c07\u6709\u52a9\u65bc\u63d0\u9ad8\u6578\u64da\u8655\u7406\u7684\u6548\u7387\u3002<\/p>\n<p>\u5982\u679c\u60a8\u6b63\u5728\u5c0b\u627e\u9ad8\u6548\u7684\u6578\u64da\u5eab\u89e3\u6c7a\u65b9\u6848\uff0c\u8003\u616e\u4f7f\u7528<a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a>\u6216<a href=\"https:\/\/server.hk\">\u4e91\u670d\u52a1\u5668<\/a>\u4f86\u652f\u6301\u60a8\u7684\u6578\u64da\u7ba1\u7406\u9700\u6c42\u3002\u7121\u8ad6\u662f\u5c0f\u578b\u4f01\u696d\u9084\u662f\u5927\u578b\u6a5f\u69cb\uff0c\u9078\u64c7\u5408\u9069\u7684<a href=\"https:\/\/server.hk\">\u670d\u52a1\u5668<\/a>\u90fd\u80fd\u70ba\u60a8\u7684\u696d\u52d9\u589e\u6dfb\u52a9\u529b\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5b78\u7fd2\u5982\u4f55\u5728\u6578\u64da\u5eab\u4e2d\u9032\u884c\u7279\u5b9a\u5b57\u6bb5\u7be9\u9078\uff0c\u63d0\u5347\u6578\u64da\u67e5\u8a62\u6548\u7387\uff0c\u5feb\u901f\u7372\u53d6\u6240\u9700\u4fe1\u606f\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-175507","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/175507","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=175507"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/175507\/revisions"}],"predecessor-version":[{"id":175508,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/175507\/revisions\/175508"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=175507"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=175507"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=175507"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}