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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.
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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