每個組的用戶

Question

我需要生成一個結果集給所有用戶羣組與用戶的每一組中的數數：

insert into groupUser value(1,"administrator"); 
insert into groupUser value(2,"commercial"); 
insert into groupUser value(3,"development"); 

insert into user value(1,"jack", 3); 
insert into user value(2,"bill", 1); 
insert into user value(3,"mark", 3); 

的結果應該是：

administrator : 1 
commercial : 0 
development : 2 

我可以找不到解決方案。

Answer 1

，因爲你沒有張貼表模式...

select g.Name, count(u.usergroupId) as members 
from groupUser g left join user u 
on u.usergroupId = g.id 
group by g.Name 

Demo Here

Answer 2

我認爲這將會給ü更好的結果

Select GroupUser,[Count] 

from (Select groupid,count(*) 'Count' from user group by groupid) t 

join Groupuser G 

on  G.id = t.id