Question

I’m working on a WinForms application with an Access database.
Please correct me.

Select * 
from EMP 
where Empid in 
    (Select id 
     from Test1 
     where pin=4 
     UNION 
     Select id 
     from Test2 
     where pin=4) 

When I try to execute this on the Access database, it gave me this error:

Operations are not allowed in subquery

Answer 1

I tried as below and its worked.

Select * 
from EMP where Empid in (Select id from Test1  where pin=4 ) UNION 
Select * 
from EMP where Empid in(Select id  from Test2  where pin=4)