Question

Users             UserGroup

id  name      rowid    GrpID   UserID   name
1   aaa         1        1      1        aaa
2   bbb         2        1      3        ccc
3   ccc         3        2      1        aaa
4   ddd         4        2      4        ddd
5   eee         5        2      5        eee

I have 2 table, user and usergroup, I want to display all the name from user table but except the userID which is associated with GrpID in the userGroup Table.

for grpID 1 i want to display
bbb
ddd
eee

I dont want to display userid 2 and 3 because it in grpID 1. I will have many grpID. How to do it in my sql. I dont want to display the name that Is already in UserGroup Table for GrpID 1.. and same condition for other GroupID

Answer 1

What about?

select name from users u
where u.id not in (
    select userid from usergroup ug
    where ug.grpid = 1)