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mysql-求大神帮忙 ---急急急,Mysl语句.....

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Release: 2016-06-06 09:43:03
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求大神帮忙我的mysql语句 ,我有 三个表,users , companys , user_log 这三个表分别是用户表,公司表,用户登录表, 现在我要求一个企业的登录人数,users表里面有companysid,user_log里面有usersid,sql语句该怎么写呢.. .. 没写出来..请大神帮忙 ..谢谢了..急啊...图片说明

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