Question

我有表用户，评论，关注，提示，集合。我需要让所有在2016年1月注册并且至少完成一项活动的用户（至少有一次，至少有一次，至少创建一个集合，至少评论一次）在同一时期完成。这是我的问题：

SELECT  distinct u.id FROM user u
where u.id in 
(select distinct t.sender_id from tip t 
WHERE t.date_added>='2016-01-01 00:00:00' AND t.date_added<'2016-02-01 00:00:00')
or u.id in 
(select distinct c.user_id from collection c 
WHERE c.date_created>='2016-01-01 00:00:00' AND c.date_created<'2016-02-01 00:00:00')
or u.id in 
(select distinct cc.postedBy_id from comment cc 
WHERE cc.date_posted>='2016-01-01 00:00:00' AND cc.date_posted<'2016-02-01 00:00:00')
or u.id in 
(select distinct f.follower_id from follow f 
WHERE f.follow_date>='2016-01-01' AND f.follow_date<'2016-02-01')
AND u.date_added>='2016-01-01 00:00:00' AND u.date_added<'2016-02-01 00:00:00'

t.date_added，c.date_created，cc.date_posted，f.follow_date，u.date_added - 具有DATETIME类型。 u.date_added - 注册日期

查询返回所有用户，而我需要u.date_added为2016年1月。我的查询有什么问题？

Answer 1

编写查询时，日期条件仅适用于最后or：

or 
(
    u.id in ()
    AND 
    u.date_added>='...' AND u.date_added<'...'
)

（如mysql docs中所述，AND优先于OR）

您需要强制执行日期条件：

SELECT distinct u.id 
FROM user u
where 
(
    u.id in (
        select distinct t.sender_id from tip t 
        WHERE t.date_added>='2016-01-01 00:00:00' AND t.date_added<'2016-02-01 00:00:00'
    )
    or 
    u.id in (
        select distinct c.user_id from collection c 
        WHERE c.date_created>='2016-01-01 00:00:00' AND c.date_created<'2016-02-01 00:00:00'
    )
    or 
    u.id in (
        select distinct cc.postedBy_id from comment cc 
        WHERE cc.date_posted>='2016-01-01 00:00:00' AND cc.date_posted<'2016-02-01 00:00:00'
    )
    or 
    u.id in (
        select distinct f.follower_id from follow f 
        WHERE f.follow_date>='2016-01-01' AND f.follow_date<'2016-02-01'
    )
)
AND 
u.date_added>='2016-01-01 00:00:00' AND u.date_added<'2016-02-01 00:00:00'

Answer 2

您也可以使用两者之间进行更清晰的查询

SELECT  distinct u.id FROM user u
where ( u.id in 
    (
        select distinct t.sender_id from tip t 
        WHERE t.date_added BETWEEN '2016-01-01 00:00:00' AND '2016-02-01 00:00:00'
    )
    or u.id in 
    (   select distinct c.user_id from collection c 
        WHERE c.date_created BETWEEN '2016-01-01 00:00:00' AND '2016-02-01 00:00:00'
    )
    or u.id in 
    (   select distinct cc.postedBy_id from comment cc 
        WHERE cc.date_posted BETWEEN '2016-01-01 00:00:00' AND '2016-02-01 00:00:00'
    )
    or u.id in 
    (
        select distinct f.follower_id from follow f 
        WHERE f.follow_date BETWEEN '2016-01-01' AND '2016-02-01'
    ) )
AND u.date_added BETWEEN '2016-01-01 00:00:00' AND '2016-02-01 00:00:00'

存在于一个或多个表中的MySql计数ID

2 个答案: