How can I make an SQL statement that finds unassociated records?

Posted by William Calleja on Stack Overflow See other posts from Stack Overflow or by William Calleja
Published on 2010-03-22T08:44:42Z Indexed on 2010/03/22 8:51 UTC
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sql

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inner-join

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select-statement

I have two tables as follows:

tblCountry (countryID, countryCode)

tblProjectCountry(ProjectID, countryID)

The tblCountry table is a list of all countries with their codes and the tblProjectCountry table associates certain countries with certain projects. I need an SQL statement that gives me a list of the countries with their country code that do NOT have an associated record in the tblProjectCountry table. so far I got to here:

SELECT     tblCountry.countryID, tblCountry.countryCode
FROM         tblProjectCountry INNER JOIN
                      tblCountry ON tblProjectCountry.countryID = tblCountry.countryID
WHERE     (SELECT     COUNT(ProjectID)
                         FROM         tblProjectCountry 
                         WHERE     (ProjectID = 1) AND (countryID = tblCountry.countryID)) = 0

The above statement parses as correct but doesn't give the exact result I'm looking for. Can anyone help?

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