{"id":1485,"date":"2022-11-06T23:09:47","date_gmt":"2022-11-06T15:09:47","guid":{"rendered":"https:\/\/qaqaq.top\/?p=1485"},"modified":"2022-11-27T12:40:59","modified_gmt":"2022-11-27T04:40:59","slug":"%e7%ac%ac3%e7%ab%a0%e5%9f%ba%e6%9c%acselect%e6%9f%a5%e8%af%a2%e8%af%be%e5%90%8e%e7%bb%83%e4%b9%a0","status":"publish","type":"post","link":"https:\/\/qaqaq.top\/?p=1485","title":{"rendered":"\u7b2c3\u7ae0\u57fa\u672cSELECT\u67e5\u8be2\u8bfe\u540e\u7ec3\u4e60"},"content":{"rendered":"\n<pre class=\"wp-block-code\"><code># \u7b2c03\u7ae0_\u57fa\u672c\u7684SELECT\u8bed\u53e5\u8bfe\u540e\u7ec3\u4e60\r\n\r\n# 1.\u67e5\u8be2\u5458\u5de512\u4e2a\u6708\u7684\u5de5\u8d44\u603b\u548c\uff0c\u5e76\u8d77\u522b\u540d\u4e3aANNUAL SALARY\r\n#\u7406\u89e31\uff1a\u8ba1\u7b9712\u6708\u7684\u57fa\u672c\u5de5\u8d44\r\nSELECT employee_id,last_name, salary * 12 AS \"ANNUAL SALARY\"\r\nFROM employees;\r\n\r\n#\u7406\u89e32\uff1a\u8ba1\u7b9712\u6708\u7684\u57fa\u672c\u5de5\u8d44\u548c\u5956\u91d1\r\nSELECT employee_id,last_name, salary * 12 * (1 + IFNULL(commission_pct,0)) AS \"ANNUAL SALARY\"\r\nFROM employees;\r\n\r\n# 2.\u67e5\u8be2employees\u8868\u4e2d\u53bb\u9664\u91cd\u590d\u7684job_id\u4ee5\u540e\u7684\u6570\u636e\r\nSELECT DISTINCT job_id\r\nFROM employees;\r\n\r\n# 3.\u67e5\u8be2\u5de5\u8d44\u5927\u4e8e12000\u7684\u5458\u5de5\u59d3\u540d\u548c\u5de5\u8d44\r\nSELECT last_name,salary\r\nFROM employees\r\nWHERE salary > 12000;\r\n\r\n# 4.\u67e5\u8be2\u5458\u5de5\u53f7\u4e3a176\u7684\u5458\u5de5\u7684\u59d3\u540d\u548c\u90e8\u95e8\u53f7\r\nSELECT last_name,department_id\r\nFROM employees\r\nWHERE employee_id = 176;\r\n\r\n# 5.\u663e\u793a\u8868 departments \u7684\u7ed3\u6784\uff0c\u5e76\u67e5\u8be2\u5176\u4e2d\u7684\u5168\u90e8\u6570\u636e\r\nDESCRIBE departments;\r\nSELECT *\r\nFROM departments;<\/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":[10],"tags":[47],"class_list":["post-1485","post","type-post","status-publish","format-standard","hentry","category-mysql-code","tag-mysql"],"_links":{"self":[{"href":"https:\/\/qaqaq.top\/index.php?rest_route=\/wp\/v2\/posts\/1485"}],"collection":[{"href":"https:\/\/qaqaq.top\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/qaqaq.top\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/qaqaq.top\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/qaqaq.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=1485"}],"version-history":[{"count":1,"href":"https:\/\/qaqaq.top\/index.php?rest_route=\/wp\/v2\/posts\/1485\/revisions"}],"predecessor-version":[{"id":1486,"href":"https:\/\/qaqaq.top\/index.php?rest_route=\/wp\/v2\/posts\/1485\/revisions\/1486"}],"wp:attachment":[{"href":"https:\/\/qaqaq.top\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1485"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/qaqaq.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1485"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/qaqaq.top\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1485"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}