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jurE
Starting Member

3 Posts
Posted - 12/02/2012 :  06:12:28  Show Profile  Reply with Quote
The question:
Display the names of the workers that live in the same cities as their chef.

Table one: Werknemer
columnes: wnr (workersnumber), wnaam (workersname), chef (wnr of the chefs)

Table two: Prive
columnes: wnr (workersnumber), wnaam (workersname), city (names of the city)

What should my OUTER JOIN LOOK LIKE?

visakh16
Very Important crosS Applying yaK Herder

India
47069 Posts
Posted - 12/02/2012 :  07:03:04  Show Profile  Reply with Quote
is chef also present as a worker in worker table?

------------------------------------------------------------------------------------------------------
SQL Server MVP
http://visakhm.blogspot.com/
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jurE
Starting Member

3 Posts
Posted - 12/02/2012 :  08:27:41  Show Profile  Reply with Quote
Yes!
quote:
Originally posted by visakh16

is chef also present as a worker in worker table?

------------------------------------------------------------------------------------------------------
SQL Server MVP
http://visakhm.blogspot.com/
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bandi
Flowing Fount of Yak Knowledge

India
1419 Posts
Posted - 12/03/2012 :  01:48:50  Show Profile  Reply with Quote
Try this once...........

;with cte 
AS
(	
	SELECT city, w.wnr, w.wnaam, chef
	FROM @Werknemer w 
	JOIN @Prive p ON w.wnr = p.wnr
)
SELECT wnaam
FROM cte c
WHERE city = (SELECT city FROM @Prive p WHERE p.wnr = c.chef)


--
Chandu
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visakh16
Very Important crosS Applying yaK Herder

India
47069 Posts
Posted - 12/03/2012 :  07:38:07  Show Profile  Reply with Quote
quote:
Originally posted by jurE

Yes!
quote:
Originally posted by visakh16

is chef also present as a worker in worker table?

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




SELECT w.wnaam
FROM Werknemer w
JOIN Prive p1
ON p1.wnr = w.wnr
JOIN Prive p2
ON p2.wnr = w.chef
WHERE p1.city = p2.city



------------------------------------------------------------------------------------------------------
SQL Server MVP
http://visakhm.blogspot.com/
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jurE
Starting Member

3 Posts
Posted - 12/04/2012 :  15:48:00  Show Profile  Reply with Quote
Thanks for all the replies!

This was the anwers:

SELECT A.wnaam AS chef, B.wnaam AS werknemer
FROM Werknemer A INNER JOIN Werknemer B
ON (A.wnr = B.chef)
INNER JOIN Prive C
ON (A.wnr = C.wnr)
INNER JOIN Prive D
ON (B.wnr = D.wnr AND C.woonplaats = D.woonplaats)
ORDER BY chef
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