mysql 中的 Sum 函数与内部查询

Question

我有如下查询：

    select b.*, SUM(h.points) as points
    from brands b left join
    histories h
    on b.id = h.brandid and h.userId = $userId
    where b.id=$brandId and b.active=1 
    group by b.id
    limit 1

我只想对以下情况求和：

where h.type != 10, h.points !=0 and points should be between two dates like this: h.time between '2016-06-01' and '2016-06-31'...

我想这可以通过使用子查询来完成，但我不确定如何...你们能帮帮我吗？？？

所需的输出将是：

userId  brandId  points 

1         64      155

1         15      100

依此类推，对于在两个日期之间获得这些分数并且分数类型不是 != 10;

的每个用户，我都很好地总结了每个分数

table 结构如下：

Brands => Histories <= Users

Answer 1

select b.id, 
sum(case when h.type <> 10 and h.time between '2016-06-01' and '2016-06-31' then h.points 
    else 0 end) as points
from brands b 
left join histories h on b.id = h.brandid and h.userId = $userId
and b.active=1 and b.id=$brandId
group by b.id

mysql 中的 Sum 函数与内部查询

Sum function in mysql with inner query

mysql

sql

sql-server

subquery