多个分组，总和

Question

我的表：

ID | TIME OF CREATION | OWNER | STATE
1    2015-1-1           arpan   A  
2    2015-1-2           arpan   B 

我的查询中我想要的o / p是：

DATE | OWNER | COUNT(STATE = A) | COUNT(STATE = B) | ...

我检查了SUM( CASE )，但您不能按日期分组并按所有者排序？

坚持到这里。 ：（

有人可以帮忙吗？

Answer 1

我认为你只想要条件聚合：

select date, owner, sum(case when state = 'A' then 1 else 0 end) as state_A,
       sum(case when state = 'B' then 1 else 0 end) as state_b
from table t
group by date, owner;