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Find where not in 2 tables

Author

Topic

PeteLeHoq
Starting Member

37 Posts

Posted - 2014-02-14 : 10:49:08

This script gets me results from one table. Checking that x does not exist in table A compared to table B.

SELECT A.x
FROM A LEFT OUTER JOIN B ON A.x = B.x
WHERE B.x IS NULL

But I also need to check x does not have another value set in a third table(C) with column(y) having a value of 3 for example.

Thanks

tkizer
Almighty SQL Goddess

38200 Posts

Posted - 2014-02-14 : 14:10:34

Add a join for the 3rd table.

Tara Kizer
SQL Server MVP since 2007
http://weblogs.sqlteam.com/tarad/

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