Multiple column Union Query without duplicates
- by Adam Halegua
I'm trying to write a Union Query with multiple columns from two different talbes (duh), but for some reason the second column of the second Select statement isn't showing up in the output. I don't know if that painted the picture properly but here is my code:
Select empno, job
From EMP
Where job = 'MANAGER'
Union
Select empno, empstate
From EMPADDRESS
Where empstate = 'NY'
Order By empno
The output looks like:
EMPNO JOB
4600 NY
5300 MANAGER
5300 NY
7566 MANAGER
7698 MANAGER
7782 MANAGER
7782 NY
7934 NY
9873 NY
Instead of 5300 and 7782 appearing twice, I thought empstate would appear next to job in the output. For all other empno's I thought the values in the fields would be (null). Am I not understanding Unions correctly, or is this how they are supposed to work?
Thanks for any help in advance.
