Question

我有这个加入：表mmp_user 151个用户 表MMP_MMPUBLISH_LOG 网址访问

    select user.name as 'Usuário',count(log.referer) as 'Número de Acessos'
from mmp_user user
left JOIN MMP_MMPUBLISH_LOG log on (user.id=log.user_id)
where log.event_date between '2015-08-01' and '2015-08-08'
group by user.id
order by count(log.referer) desc

预期结果： 151行 获得的结果： 11行

请帮帮我

Answer 1

试试这个

SELECT u.name as 'Usuário',count(log.referer) as 'Número de Acessos'
FROM mmp_user u
LEFT JOIN (
    SELECT user_id, referer
    FROM MMP_MMPUBLISH_LOG
    WHERE event_date BETWEEN '2015-08-01' AND '2015-08-08'
) log ON u.id=log.user_id
group by u.id
order by count(log.referer) desc

PS。下次没有使用“用户”时，它不清楚

左边连接右表中的位置

1 个答案: