Match Same criteria on certain groups

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Match Same criteria on certain groups

Author

Topic

db_sysadmin
Starting Member

27 Posts

Posted - 2006-05-10 : 10:21:40

Hey Guys!

I need to check where all of the relatives of an employee matches some certain criteria all at the same time...

Example:

Employee_ID....Relative_ID.....Rel_Name....Rel_Sex
...1...............1............John.........M
...1...............2............Mary.........F
...1...............3............Hank.........M
...2...............1............Lucy.........F
...2...............2............Jane.........F
...2...............3............Julie........F
...3...............1............Sandra.......F
...3...............2............Mark.........M
...4...............1............Willie.......M

The query I want to perform would be like:

Employee_ID where all relatives have Rel_Sex = Female (F)

The result of this query would be:

Employee_ID
-----------
....2

Whats the way or best way to do it?

Thanks a lot guys!

sshelper
Posting Yak Master

216 Posts

Posted - 2006-05-10 : 11:39:33

Try this:

SELECT Employee_ID, COUNT(*), SUM(CASE WHEN Rel_Sex = 'F' THEN 1 ELSE 0 END)
FROM Employees
GROUP BY Employee_ID
HAVING COUNT(*) = SUM(CASE WHEN Rel_Sex = 'F' THEN 1 ELSE 0 END)

SQL Server Helper
http://www.sql-server-helper.com

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