{"id":178,"date":"2021-08-10T13:42:01","date_gmt":"2021-08-10T05:42:01","guid":{"rendered":"https:\/\/9iwd.top\/?p=178"},"modified":"2021-08-10T14:01:02","modified_gmt":"2021-08-10T06:01:02","slug":"mysql-%e5%88%9d%e8%a7%81%e6%9f%a5%e8%af%a2","status":"publish","type":"post","link":"http:\/\/9iwd.top\/?p=178","title":{"rendered":"No2 mysql \u521d\u89c1\u67e5\u8be2"},"content":{"rendered":"\n<pre class=\"wp-block-code\"><code>\/*\n\u57fa\u7840\u8bf4\u660e:\n\u7b80\u5355\u67e5\u8be2\n\u67e5\u8be2\u4e00\u4e2a\u5b57\u6bb5\uff1f\nSQL\u8bed\u53e5:select \u5b57\u6bb5\u540d from \u8868\u540d;\n\u5176\u4e2d\u8981\u6ce8\u610f\uff1a\n select\u548cfrom\u90fd\u662f\u5173\u952e\u5b57\u3002\n \u5b57\u6bb5\u540d\u548c\u8868\u540d\u90fd\u662f\u6807\u8bc6\u7b26\u3002\n\u5f3a\u8c03\uff1a\n \u5bf9\u4e8eSQL\u8bed\u53e5\u6765\u8bf4\uff0c\u662f\u901a\u7528\u7684\uff0c\n \u6240\u6709\u7684SQL\u8bed\u53e5\u4ee5\u201c;\u201d\u7ed3\u5c3e\u3002\n \u53e6\u5916SQL\u8bed\u53e5\u4e0d\u533a\u5206\u5927\u5c0f\u5199\uff0c\u90fd\u884c\u3002\n*\/<\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code>\/\/\u4e8b\u4f8b:\u67e5\u8be2\u90e8\u95e8\u540d\u5b57\uff1f\nmysql> select dname from dept;\n+------------+\n| dname      |\n+------------+\n| ACCOUNTING |\n| RESEARCH   |\n| SALES      |\n| OPERATIONS |\n+------------+\n<\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code>\/\/\u67e5\u8be2\u4e24\u4e2a\u5b57\u6bb5\uff0c\u6216\u8005\u591a\u4e2a\u5b57\u6bb5\u600e\u4e48\u529e\uff1f\r\n\/\/\u4f7f\u7528\u9017\u53f7\u9694\u5f00\u201c,\u201d\r\n\/\/\u67e5\u8be2\u90e8\u95e8\u7f16\u53f7\u548c\u90e8\u95e8\u540d\uff1f\r\nmysql> select deptno,dname from dept;\r\n+--------+------------+\r\n| deptno | dname      |\r\n+--------+------------+\r\n|     10 | ACCOUNTING |\r\n|     20 | RESEARCH   |\r\n|     30 | SALES      |\r\n|     40 | OPERATIONS |\r\n+--------+------------+\n<\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code>\/*\r\n\/\/\u67e5\u8be2\u6240\u6709\u5b57\u6bb5\u600e\u4e48\u529e\uff1f\r\n\u7b2c\u4e00\u79cd\u65b9\u5f0f\uff1a\u53ef\u4ee5\u628a\u6bcf\u4e2a\u5b57\u6bb5\u90fd\u5199\u4e0a\r\n select a,b,c,d,e,f... from tablename;\r\n\r\n\u7b2c\u4e8c\u79cd\u65b9\u5f0f\uff1a\u53ef\u4ee5\u4f7f\u7528*\r\n select * from dept;\r\n*\/\r\nmysql> select * from dept;\r\n+--------+------------+----------+\r\n| DEPTNO | DNAME      | LOC      |\r\n+--------+------------+----------+\r\n|     10 | ACCOUNTING | NEW YORK |\r\n|     20 | RESEARCH   | DALLAS   |\r\n|     30 | SALES      | CHICAGO  |\r\n|     40 | OPERATIONS | BOSTON   |\r\n+--------+------------+----------+\r\n\/*\r\n\u8fd9\u79cd\u65b9\u5f0f\u7684\u7f3a\u70b9\uff1a\r\n 1\u3001\u6548\u7387\u4f4e\r\n 2\u3001\u53ef\u8bfb\u6027\u5dee\u3002\r\n\u5728\u5b9e\u9645\u5f00\u53d1\u4e2d\u4e0d\u5efa\u8bae\uff0c\u53ef\u4ee5\u81ea\u5df1\u73a9\u6ca1\u95ee\u9898\u3002\r\n\u4f60\u53ef\u4ee5\u5728DOS\u547d\u4ee4\u7a97\u53e3\u4e2d\u60f3\u5feb\u901f\u7684\u770b\u4e00\u770b\u5168\u8868\u6570\u636e\u53ef\u4ee5\u91c7\u7528\u8fd9\u79cd\u65b9\u5f0f\u3002\r\n*\/<\/code><\/pre>\n\n\n\n<pre class=\"wp-block-code\"><code><\/code><\/pre>\n","protected":false},"excerpt":{"rendered":"","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[11],"tags":[],"_links":{"self":[{"href":"http:\/\/9iwd.top\/index.php?rest_route=\/wp\/v2\/posts\/178"}],"collection":[{"href":"http:\/\/9iwd.top\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"http:\/\/9iwd.top\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"http:\/\/9iwd.top\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"http:\/\/9iwd.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=178"}],"version-history":[{"count":7,"href":"http:\/\/9iwd.top\/index.php?rest_route=\/wp\/v2\/posts\/178\/revisions"}],"predecessor-version":[{"id":194,"href":"http:\/\/9iwd.top\/index.php?rest_route=\/wp\/v2\/posts\/178\/revisions\/194"}],"wp:attachment":[{"href":"http:\/\/9iwd.top\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=178"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"http:\/\/9iwd.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=178"},{"taxonomy":"post_tag","embeddable":true,"href":"http:\/\/9iwd.top\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=178"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}