You'll need to use LEFT JOIN, that will show all records that match and a row in the
second table will all values NULL where there is no match. Then you find all those rows
that have no match in your WHERE clause.
From: Miguel Vaz [mailto:pagongski@stripped]
Sent: Tuesday, December 15, 2009 10:43 AM
Subject: Count records in join
I am stuck with a suposedly simple query:
- i have two tables (:
How can i list all records from PROGS with a sum of how many events each
have? I want to find the progs that are empty.
I remember something about using NULL, but i cant remember. :-P
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