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Three Table Join

Author

Topic

alajata
Starting Member

1 Post

Posted - 2012-02-10 : 10:04:37

There are three tables-users,categories and photos.
A category has an owner and a photo has a parent category.
I need a query that finds all users who have no photos in their ategories

visakh16
Very Important crosS Applying yaK Herder

52326 Posts

Posted - 2012-02-10 : 10:07:42

[code]
SELECT u.*
FROM users u
WHERE NOT EXISTS(SELECT 1 FROM categories c
INNER JOIN photos p
ON p.parentcategoryid = c.categoryid
WHERE c.ownerid = u.userid
)
[/code]

i've assumed column names so please make sure you use actual column names instead

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SQL Server MVP
http://visakhm.blogspot.com/

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