Re: SQL Union Join?

Write your statement as if you were doing a regular join. But before join
type in "exception join"

Select a.* from filea a
exception join fileb b
on a.key1 = b.key1
union
Select b.* from fileb b
exception join filea a
on a.key1 = b.key1


The first will give you all records in filea not found in fileb.
The union will give you all records in fileb not found in filea. (if
that's what you were asking for).



midrange-l-bounces@xxxxxxxxxxxx wrote on 03/26/2009 09:44:53 AM:

How about the following
select b.col1, b.col2, b.col3 from tableb b where not exists
(select * from tablea a where
a.col3 = b.col3)
or something similar
This is untested so I may have got something wrong


Alan Shore
Programmer/Analyst, Distribution
E:AShore@xxxxxxxxxxx
P:(631) 200-5019
C:(631) 880-8640
"If you're going through Hell, keep going" - Winston Churchill

midrange-l-bounces@xxxxxxxxxxxx wrote on 03/26/2009 09:30:52 AM:

If I have two tables (TABLEA, TABLEB) that have the same format, and I

want

to retrieve all the rows where a combination of two columns don't

match,

would that be a union join? If so, how is that specified? Here's what I
have:

TABLEA and TABLE have the format of SKU, name and category. A SKU could
exist in multiple categories.

TABLEA
123, NAME1, 1001
456, NAME2, 1002
123, NAME1, 1002
789, NAME3, 1004

TABLEB
001, SOMETHING, 1002
123, NAME1, 1003
456, NAME2, 1002
123, NAME1, 1002

I want to retrieve 123, NAME1, 1003 because that's the one that has a
different category. I don't want to retrieve SKU 456, 789, or 001.
Hmmm...maybe I need to match on SKU with a subselect for that SKU not

having

that category?

Thanks!
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