您好,欢迎访问一九零五行业门户网

复杂的sql语句join的使用(left join,right join)_MySQL

bitscn.com select u.*,count(u.id) as sum
02
                    from user as u
03
                    left join post as p
04
                    on p.user_id = u.id
05
                    right join user_has_group as up
06
                    on up.user_id = u.id
07
                    right join user_has_email as ue
08
                    on ue.user_id = u.id
09
                    where u.username != ''
10
                    and up.group_id = {$args['groupid']}
11
                    and ue.email = '{$args['useremail']}'
12
                    group by u.id order by u.id desc bitscn.com
其它类似信息

推荐信息