sql - 这个 MySQL 查询有什么问题？

Question

抱歉，这是一个菜鸟问题。我是 MySQL 新手:

我写了这样一个查询:

SELECT
    u.userid, u.alias, g.company_name,
 v.endtime - v.begintime AS duration, 
    u.status, u.service_starttime,
 u.service_expiretime, v.begintime, u.email
FROM
    company_users c, company_groups g INNER JOIN
    user_info u INNER JOIN vfon_log v 
    ON (u.userid = v.hostid) ON (g.company_id = u.company_id)

此查询返回语法错误:

Query : SELECT        u.userid, u.alias, g.company_name, v.endtime - v.begintime AS duration, u.status, u.service_starttime, u.service_ex...
Error Code : 1064
You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'ON (g.company_id = u.company_id)
 LIMIT 0, 1000' at line 4
Execution Time : 00:00:00:000
Transfer Time  : 00:00:00:000
Total Time     : 00:00:00:000

我已经花了 30 分钟查看，但我无法弄清楚哪里出了问题。

非常感谢你的帮助

Answer 1

ON (g.company_id = u.company_id)

应该在 INNER JOIN user_info u 之后

这样就变成了

SELECT
    u.userid, u.alias, g.company_name,
 v.endtime - v.begintime AS duration, 
    u.status, u.service_starttime,
 u.service_expiretime, v.begintime, u.email
FROM
    company_users c, company_groups g 
INNER JOIN user_info u ON (g.company_id = u.company_id)
INNER JOIN vfon_log v  ON (u.userid = v.hostid)