{"id":76262,"date":"2024-10-16T05:12:15","date_gmt":"2024-10-15T21:12:15","guid":{"rendered":"https:\/\/server.hk\/cnblog\/76262\/"},"modified":"2024-10-16T05:12:15","modified_gmt":"2024-10-15T21:12:15","slug":"mysql%e5%85%a5%e9%96%80%ef%bc%9a%e4%bd%bf%e7%94%a8select-column1-column2-from-table%e5%be%9e%e4%b8%80%e5%80%8b%e8%a1%a8%e4%b8%ad%e9%81%b8%e6%93%87%e7%89%b9%e5%ae%9a%e7%9a%84%e5%88%97%e3%80%82","status":"publish","type":"post","link":"https:\/\/server.hk\/cnblog\/76262\/","title":{"rendered":"MySQL\u5165\u9580\uff1a\u4f7f\u7528SELECT column1, column2 FROM table\u5f9e\u4e00\u500b\u8868\u4e2d\u9078\u64c7\u7279\u5b9a\u7684\u5217\u3002"},"content":{"rendered":"<h1 id=\"mysql%e5%85%a5%e9%96%80%ef%bc%9a%e4%bd%bf%e7%94%a8select-column1-column2-from-table%e5%be%9e%e4%b8%80%e5%80%8b%e8%a1%a8%e4%b8%ad%e9%81%b8%e6%93%87%e7%89%b9%e5%ae%9a%e7%9a%84%e5%88%97-tJBqjKykKx\">MySQL\u5165\u9580\uff1a\u4f7f\u7528SELECT column1, column2 FROM table\u5f9e\u4e00\u500b\u8868\u4e2d\u9078\u64c7\u7279\u5b9a\u7684\u5217<\/h1>\n<p>MySQL\u662f\u4e00\u7a2e\u6d41\u884c\u7684\u95dc\u806f\u6578\u64da\u5eab\u7ba1\u7406\u7cfb\u7d71\uff0c\u5ee3\u6cdb\u61c9\u7528\u65bc\u5404\u7a2e\u7db2\u7ad9\u548c\u61c9\u7528\u7a0b\u5e8f\u4e2d\u3002\u4f5c\u70ba\u4e00\u540d\u521d\u5b78\u8005\uff0c\u4e86\u89e3\u5982\u4f55\u5f9e\u6578\u64da\u5eab\u4e2d\u9078\u64c7\u7279\u5b9a\u7684\u5217\u662f\u975e\u5e38\u91cd\u8981\u7684\u3002\u672c\u6587\u5c07\u4ecb\u7d39\u5982\u4f55\u4f7f\u7528SQL\u8a9e\u53e5\u4e2d\u7684SELECT\u8a9e\u53e5\u4f86\u9078\u64c7\u7279\u5b9a\u7684\u5217\uff0c\u4e26\u63d0\u4f9b\u4e00\u4e9b\u5be6\u7528\u7684\u793a\u4f8b\u3002<\/p>\n<h2 id=\"select%e8%aa%9e%e5%8f%a5%e7%9a%84%e5%9f%ba%e6%9c%ac%e7%b5%90%e6%a7%8b-tJBqjKykKx\">SELECT\u8a9e\u53e5\u7684\u57fa\u672c\u7d50\u69cb<\/h2>\n<p>\u5728MySQL\u4e2d\uff0cSELECT\u8a9e\u53e5\u662f\u7528\u4f86\u67e5\u8a62\u6578\u64da\u7684\u4e3b\u8981\u5de5\u5177\u3002\u5176\u57fa\u672c\u8a9e\u6cd5\u5982\u4e0b\uff1a<\/p>\n<pre><code>SELECT column1, column2 FROM table_name;<\/code><\/pre>\n<p>\u5728\u9019\u88e1\uff0c<code>column1<\/code>\u548c<code>column2<\/code>\u662f\u4f60\u5e0c\u671b\u5f9e\u6307\u5b9a\u7684<code>table_name<\/code>\u4e2d\u9078\u64c7\u7684\u5217\u540d\u3002\u9019\u6a23\u7684\u67e5\u8a62\u5c07\u8fd4\u56de\u9019\u4e9b\u5217\u7684\u6240\u6709\u6578\u64da\u3002<\/p>\n<h2 id=\"%e7%a4%ba%e4%be%8b%ef%bc%9a%e5%be%9e%e4%b8%80%e5%80%8b%e8%a1%a8%e4%b8%ad%e9%81%b8%e6%93%87%e7%89%b9%e5%ae%9a%e7%9a%84%e5%88%97-tJBqjKykKx\">\u793a\u4f8b\uff1a\u5f9e\u4e00\u500b\u8868\u4e2d\u9078\u64c7\u7279\u5b9a\u7684\u5217<\/h2>\n<p>\u5047\u8a2d\u6211\u5011\u6709\u4e00\u500b\u540d\u70ba<code>employees<\/code>\u7684\u8868\uff0c\u8a72\u8868\u5305\u542b\u4ee5\u4e0b\u5217\uff1a<\/p>\n<ul>\n<li>id<\/li>\n<li>name<\/li>\n<li>position<\/li>\n<li>salary<\/li>\n<\/ul>\n<p>\u5982\u679c\u6211\u5011\u53ea\u60f3\u9078\u64c7\u54e1\u5de5\u7684\u59d3\u540d\u548c\u8077\u4f4d\uff0c\u53ef\u4ee5\u4f7f\u7528\u4ee5\u4e0bSQL\u8a9e\u53e5\uff1a<\/p>\n<pre><code>SELECT name, position FROM employees;<\/code><\/pre>\n<p>\u57f7\u884c\u9019\u689d\u8a9e\u53e5\u5f8c\uff0c\u5c07\u8fd4\u56de\u6240\u6709\u54e1\u5de5\u7684\u59d3\u540d\u548c\u8077\u4f4d\uff0c\u800c\u4e0d\u6703\u986f\u793a\u5176\u4ed6\u5217\u7684\u6578\u64da\u3002<\/p>\n<h2 id=\"%e4%bd%bf%e7%94%a8where%e5%ad%90%e5%8f%a5%e9%80%b2%e8%a1%8c%e7%af%a9%e9%81%b8-tJBqjKykKx\">\u4f7f\u7528WHERE\u5b50\u53e5\u9032\u884c\u7be9\u9078<\/h2>\n<p>\u5728\u67d0\u4e9b\u60c5\u6cc1\u4e0b\uff0c\u6211\u5011\u53ef\u80fd\u53ea\u60f3\u9078\u64c7\u7b26\u5408\u7279\u5b9a\u689d\u4ef6\u7684\u6578\u64da\u3002\u9019\u6642\u53ef\u4ee5\u4f7f\u7528<code>WHERE<\/code>\u5b50\u53e5\u4f86\u9032\u884c\u7be9\u9078\u3002\u4f8b\u5982\uff0c\u5982\u679c\u6211\u5011\u53ea\u60f3\u67e5\u8a62\u85aa\u6c34\u9ad8\u65bc50000\u7684\u54e1\u5de5\u59d3\u540d\u548c\u8077\u4f4d\uff0c\u53ef\u4ee5\u9019\u6a23\u5beb\uff1a<\/p>\n<pre><code>SELECT name, position FROM employees WHERE salary &gt; 50000;<\/code><\/pre>\n<p>\u9019\u6a23\u7684\u67e5\u8a62\u5c07\u50c5\u8fd4\u56de\u85aa\u6c34\u9ad8\u65bc50000\u7684\u54e1\u5de5\u7684\u59d3\u540d\u548c\u8077\u4f4d\u3002<\/p>\n<h2 id=\"%e6%8e%92%e5%ba%8f%e6%9f%a5%e8%a9%a2%e7%b5%90%e6%9e%9c-tJBqjKykKx\">\u6392\u5e8f\u67e5\u8a62\u7d50\u679c<\/h2>\n<p>\u6709\u6642\u5019\uff0c\u6211\u5011\u5e0c\u671b\u67e5\u8a62\u7d50\u679c\u6309\u7167\u67d0\u500b\u5217\u9032\u884c\u6392\u5e8f\u3002\u53ef\u4ee5\u4f7f\u7528<code>ORDER BY<\/code>\u5b50\u53e5\u4f86\u5be6\u73fe\u3002\u4f8b\u5982\uff0c\u5982\u679c\u6211\u5011\u60f3\u6309\u7167\u85aa\u6c34\u5f9e\u9ad8\u5230\u4f4e\u6392\u5e8f\uff0c\u53ef\u4ee5\u9019\u6a23\u5beb\uff1a<\/p>\n<pre><code>SELECT name, position FROM employees ORDER BY salary DESC;<\/code><\/pre>\n<p>\u9019\u6a23\u7684\u67e5\u8a62\u5c07\u8fd4\u56de\u6240\u6709\u54e1\u5de5\u7684\u59d3\u540d\u548c\u8077\u4f4d\uff0c\u4e26\u6309\u7167\u85aa\u6c34\u5f9e\u9ad8\u5230\u4f4e\u7684\u9806\u5e8f\u6392\u5217\u3002<\/p>\n<h2 id=\"%e5%b0%8f%e7%b5%90-tJBqjKykKx\">\u5c0f\u7d50<\/h2>\n<p>\u5728MySQL\u4e2d\uff0c\u4f7f\u7528SELECT\u8a9e\u53e5\u9078\u64c7\u7279\u5b9a\u7684\u5217\u662f\u4e00\u500b\u57fa\u672c\u800c\u91cd\u8981\u7684\u6280\u80fd\u3002\u901a\u904e\u4f7f\u7528WHERE\u5b50\u53e5\u9032\u884c\u7be9\u9078\u548cORDER BY\u5b50\u53e5\u9032\u884c\u6392\u5e8f\uff0c\u6211\u5011\u53ef\u4ee5\u66f4\u9748\u6d3b\u5730\u67e5\u8a62\u6578\u64da\u3002\u638c\u63e1\u9019\u4e9b\u57fa\u672c\u64cd\u4f5c\u5f8c\uff0c\u60a8\u5c07\u80fd\u5920\u66f4\u6709\u6548\u5730\u7ba1\u7406\u548c\u5206\u6790\u6578\u64da\u3002<\/p>\n<p>\u5982\u679c\u60a8\u5c0d\u65bc\u6578\u64da\u5eab\u7ba1\u7406\u6709\u66f4\u6df1\u5165\u7684\u9700\u6c42\uff0c\u8003\u616e\u4f7f\u7528<a href=\"https:\/\/server.hk\">\u9999\u6e2fVPS<\/a>\u4f86\u642d\u5efa\u60a8\u7684\u6578\u64da\u5eab\u74b0\u5883\uff0c\u9019\u6a23\u53ef\u4ee5\u63d0\u4f9b\u66f4\u9ad8\u7684\u6027\u80fd\u548c\u9748\u6d3b\u6027\u3002\u7121\u8ad6\u662f\u958b\u767c\u9084\u662f\u751f\u7522\u74b0\u5883\uff0c\u9078\u64c7\u5408\u9069\u7684<a href=\"https:\/\/server.hk\">\u9999\u6e2f\u4f3a\u670d\u5668<\/a>\u90fd\u80fd\u5e6b\u52a9\u60a8\u66f4\u597d\u5730\u7ba1\u7406\u6578\u64da\u3002<\/p>\n","protected":false},"excerpt":{"rendered":"<p>\u5b78\u7fd2MySQL\u5165\u9580\uff0c\u638c\u63e1\u5982\u4f55\u4f7f\u7528SELECT\u8a9e\u53e5\u5f9e\u8868\u4e2d\u9078\u64c7\u7279\u5b9a\u5217\uff0c\u63d0\u5347\u6578\u64da\u67e5\u8a62\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-76262","post","type-post","status-publish","format-standard","hentry","category-database"],"_links":{"self":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/76262","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=76262"}],"version-history":[{"count":1,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/76262\/revisions"}],"predecessor-version":[{"id":76263,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/posts\/76262\/revisions\/76263"}],"wp:attachment":[{"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/media?parent=76262"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/categories?post=76262"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/server.hk\/cnblog\/wp-json\/wp\/v2\/tags?post=76262"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}