Question

I need to determine which items in the table OtherItems and also exist in ItemMain and which doesn’t.

The problem is that some UPC’s have a 0 in the beginning and some don’t.

So I tried this query but the results don’t look good.

SELECT * from OtherItems
WHERE UPC like '0%' and upc not in(select '0' + UPC from itemmain)
Or UPC not in(select UPC from itemmain))

Can some one guide me in what I’m doing wrong here?

Answer 1

select * 
from OtherItems 
where not exists ( select * 
                   from itemmain 
                   where UPC=OtherItems.UPC or '0'+UPC=OtherItems.UPC )

or perhaps:

select * 
from OtherItems 
where ( UPC like '0%' 
        and not exists (select * from itemmain where '0'+UPC=OtherItems.UPC) )
   or ( UPC not like '0%' 
        and not exists (select * from itemmain where UPC=OtherItems.UPC) )