It sounds like a cartesian join. Have you run an explain plan on this query?
What are you joining the two tables on?
From: Aaron Wolski
Sent: 7/9/04 10:33 AM
Subject: anyone help with this query? Returning tooooo many results
Having a problem with a query that's returning 486,057 results when it
most definitely should NOT be doing that.
I have two tables:
1 for a list of customers that purchase product A, another for customers
who purchased product B.
I am trying to compare table 1 to table 2 to get a result set that gives
me the contact info (table columns) for those whose email addresses in
table 1 DON'T EQUAL those in table two.
In table one I have 2026 records
In table two I have 240 records
The query is this:
SELECT * FROM producta_customers AS t1, productb_customers AS t2 WHERE
t1.email != t2.email
When I do this query. I get 486,057 results returne.
Where am I going wrong? Any ideas?
Thanks so much for the help!
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