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 Query to find multiple records
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Starting Member

United Kingdom
16 Posts

Posted - 01/02/2013 :  17:31:39  Show Profile  Reply with Quote

I need to write a query that will look in a table and return the user ID of a person who has been allocated for all of the departments. The tables look like:

PERSON(person_id, person_name)
ALLOCATION(alloc_id, person_id, dep_id, date_start, date_end)
DEPARTMENT(dep_id, dep_name)

There are 4 departments, with ID's of 1,2,3 and 4. I cannot use a count, as the person may quit a dept. then work for it again meaning the count will return 2, when theyve only really worked for 1...

Does anybody know how I would go about this?

Flowing Fount of Yak Knowledge

2870 Posts

Posted - 01/02/2013 :  17:54:32  Show Profile  Reply with Quote
SELECT p.Person_id,p.person_name
FROM person p
INNER JOIN ALLOCATION a on p.person_id = a.person_id
INNER JOIN DEPARTMENT d on a.dep_id = d.dep_id
GROUP BY p.Person_id,p.person_name
HAVING COUNT(distinct dep_id) = 4


Everyday I learn something that somebody else already knew
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Starting Member

United Kingdom
16 Posts

Posted - 01/02/2013 :  18:05:49  Show Profile  Reply with Quote
Thanks Jim! Appreciate that!

How come both person_id and person_name are in the group by column, just out of curiosity?
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Very Important crosS Applying yaK Herder

52325 Posts

Posted - 01/03/2013 :  00:51:26  Show Profile  Reply with Quote
if you want to select both of columns they both need to be in GROUP BY. It doesnt cause any problem as person_id to person_name relationship would always be 1 to 1

SQL Server MVP

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