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From:Gavin Towey Date:December 15 2009 7:14pm
Subject:RE: Count records in join
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Hi Miguel,

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.

Gavin Towey

-----Original Message-----
From: Miguel Vaz [mailto:pagongski@stripped]
Sent: Tuesday, December 15, 2009 10:43 AM
To: mysql@stripped
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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Count records in joinMiguel Vaz15 Dec
  • RE: Count records in joinGavin Towey15 Dec
    • Re: Count records in joinJohan De Meersman16 Dec
      • Re: Count records in joinMiguel Vaz16 Dec
        • RE: Count records in joinJerry Schwartz16 Dec
          • Re: Count records in joinMiguel Vaz16 Dec