这是我的输入表格(标签),其中包含用户ID和“已验证购买”。 (用户可以尝试购买,但可以决定不购买。因此验证购买)
UserID Verified_Purchase
1001 T
1001 T
1001 F
1002 T
1002 T
1003 F
1004 T
1004 F
My expected output is to find out the no of unique buyers / non buyers.
No of Buyers : 3 (1001,1002,1004)
No of Non Buyers : 1 (only 1003)
我尝试过:
select distinct UserID from tab
WHERE Verified_Purchase = 'T'
select distinct UserID from tab
WHERE Verified_Purchase = 'F'
但由于很少有用户被重复计算,因此这些答案并没有给出正确答案。
请让我知道如何继续这样做。
答案 0 :(得分:1)
首先,按userId汇总,然后汇总:
select is_verified, count(*) as num_users
from (select UserId, max( Verified_Purchase = 'T' ) as is_verified
from tab t
group by UserId
) t
group by is_verified;