Question

鉴于我有以下两个表：

User
-------
UserID



UserLikes
----------
UserID
OtherUserID

当用户喜欢其他用户时，执行该用户的用户将被存储为UserID，而接收该用户的用户将被存储为OtherUserID。

如何获得显示已提供给用户数量的分布：

0喜欢

1-10喜欢

11-50喜欢

51-100喜欢

101 +喜欢

Answer 1

例如，喜欢1到10岁的人：

SELECT T.userID,count(*) as TotalLikes
FROM UserLikes t
GROUP BY T.userID
HAVING COUNT(*) between 1 and 10

要更改范围，只需更改having子句

即可

HAVING COUNT(*) = 0
HAVING COUNT(*) between 1 and 10
HAVING COUNT(*) between 11 and 50
HAVING COUNT(*) between 51 and 100
HAVING COUNT(*) > 100

如果您的意思是希望结果如下：

0 likes | 1-10 likes | ....
   3          5         ....

然后：

SELECT sum(case when TotalLikes = 0 then 1 else 0 end) as No_Likes,
SELECT sum(case when TotalLikes between 1 and 10 then 1 else 0 end) as One_To_ten_likes,
SELECT sum(case when TotalLikes between 11 and 50 then 1 else 0 end) as Eleven_To_Fifty_Likes,
.......
FROM(
    SELECT T.userID,count(*) as TotalLikes
    FROM UserLikes t
    GROUP BY T.userID)

SQL按范围按唯一ID组选择行计数

1 个答案: