{"id":1489,"date":"2022-11-06T23:10:24","date_gmt":"2022-11-06T15:10:24","guid":{"rendered":"https:\/\/qaqaq.top\/?p=1489"},"modified":"2022-11-27T12:40:59","modified_gmt":"2022-11-27T04:40:59","slug":"%e7%ac%ac4%e7%ab%a0%e8%bf%90%e7%ae%97%e7%ac%a6%e8%af%be%e5%90%8e%e7%bb%83%e4%b9%a0","status":"publish","type":"post","link":"https:\/\/qaqaq.top\/?p=1489","title":{"rendered":"\u7b2c4\u7ae0\u8fd0\u7b97\u7b26\u8bfe\u540e\u7ec3\u4e60"},"content":{"rendered":"\n<pre class=\"wp-block-code\"><code># \u7b2c04\u7ae0 \u8fd0\u7b97\u7b26\u8bfe\u540e\u7ec3\u4e60\r\n\r\n# 1.\u9009\u62e9\u5de5\u8d44\u4e0d\u57285000\u523012000\u7684\u5458\u5de5\u7684\u59d3\u540d\u548c\u5de5\u8d44\r\nSELECT last_name,salary\r\nFROM employees\r\n# WHERE salary NOT BETWEEN 5000 AND 12000;\r\nWHERE salary &lt; 5000 OR salary > 12000;\r\n\r\n# 2.\u9009\u62e9\u572820\u621650\u53f7\u90e8\u95e8\u5de5\u4f5c\u7684\u5458\u5de5\u59d3\u540d\u548c\u90e8\u95e8\u53f7\r\nSELECT last_name,department_id\r\nFROM employees\r\n# WHERE department_id IN (20,50);\r\nWHERE department_id = 20 OR department_id = 50;\r\n\r\n# 3.\u9009\u62e9\u516c\u53f8\u4e2d\u6ca1\u6709\u7ba1\u7406\u8005\u7684\u5458\u5de5\u59d3\u540d\u53cajob_id\r\nSELECT last_name,job_id,manager_id\r\nFROM employees\r\nWHERE manager_id IS NULL;\r\n\r\nSELECT last_name,job_id,manager_id\r\nFROM employees\r\nWHERE manager_id &lt;=> NULL;\r\n\r\n# 4.\u9009\u62e9\u516c\u53f8\u4e2d\u6709\u5956\u91d1\u7684\u5458\u5de5\u59d3\u540d\uff0c\u5de5\u8d44\u548c\u5956\u91d1\u7ea7\u522b\r\nSELECT last_name,salary,commission_pct\r\nFROM employees\r\nWHERE commission_pct IS NOT NULL;\r\n\r\nSELECT last_name,salary,commission_pct\r\nFROM employees\r\nWHERE NOT commission_pct &lt;=> NULL;\r\n\r\n# 5.\u9009\u62e9\u5458\u5de5\u59d3\u540d\u7684\u7b2c\u4e09\u4e2a\u5b57\u6bcd\u662fa\u7684\u5458\u5de5\u59d3\u540d\r\nSELECT last_name\r\nFROM employees\r\nWHERE last_name LIKE '__a%';\r\n\r\n# 6.\u9009\u62e9\u59d3\u540d\u4e2d\u6709\u5b57\u6bcda\u548ck\u7684\u5458\u5de5\u59d3\u540d\r\nSELECT last_name\r\nFROM employees\r\n# WHERE last_name LIKE '%a%k%' OR last_name LIKE '%k%a%';\r\nWHERE last_name LIKE '%a%' AND last_name LIKE '%k%';\r\n\r\n# 7.\u663e\u793a\u51fa\u8868 employees \u8868\u4e2d first_name \u4ee5 'e'\u7ed3\u5c3e\u7684\u5458\u5de5\u4fe1\u606f\r\nSELECT first_name,last_name\r\nFROM employees\r\nWHERE last_name LIKE '%e';\r\n\r\nSELECT first_name,last_name\r\nFROM employees\r\nWHERE first_name REGEXP 'e$'; # \u4ee5e\u5f00\u5934\u7684\u5199\u6cd5\uff1a'^e'\r\n# 8.\u663e\u793a\u51fa\u8868 employees \u90e8\u95e8\u7f16\u53f7\u5728 80-100 \u4e4b\u95f4\u7684\u59d3\u540d\u3001\u5de5\u79cd\r\nSELECT last_name,job_id\r\nFROM employees\r\n#\u65b9\u5f0f1\uff1a\u63a8\u8350\r\nWHERE department_id BETWEEN 80 AND 100;\r\n#\u65b9\u5f0f2\uff1a\u63a8\u8350\uff0c\u4e0e\u65b9\u5f0f1\u76f8\u540c\r\n# WHERE department_id >= 80 AND department_id &lt;= 100;\r\n#\u65b9\u5f0f3\uff1a\u4ec5\u9002\u7528\u4e8e\u672c\u9898\u7684\u65b9\u5f0f\u3002\r\n# WHERE department_id IN (80,90,100);\r\n\r\nSELECT * FROM departments;\r\n\r\n# 9.\u663e\u793a\u51fa\u8868 employees \u7684 manager_id \u662f 100,101,110 \u7684\u5458\u5de5\u59d3\u540d\u3001\u5de5\u8d44\u3001\u7ba1\u7406\u8005id\r\nSELECT last_name,salary,manager_id\r\nFROM employees\r\nWHERE manager_id IN (100,101,110);<\/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-1489","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\/1489"}],"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=1489"}],"version-history":[{"count":1,"href":"https:\/\/qaqaq.top\/index.php?rest_route=\/wp\/v2\/posts\/1489\/revisions"}],"predecessor-version":[{"id":1490,"href":"https:\/\/qaqaq.top\/index.php?rest_route=\/wp\/v2\/posts\/1489\/revisions\/1490"}],"wp:attachment":[{"href":"https:\/\/qaqaq.top\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=1489"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/qaqaq.top\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=1489"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/qaqaq.top\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=1489"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}