Question

In SQL Server (2008), I’d like to find all employees in a single table that have skillids of 3, 4, 5 or 4, 5, 6. They need to have one of those sets. Just having skillid=4, for example, should not produce a match. How do I construct this type of query?

An example table:

pkid, empid, skillid
 1     2       3
 2     2       4
 3     2       5
 4     5       6

In the above example, empid=2 is a match for the set 3,4,5. empid=5 is not.

Answer 1

You will need to use a GROUP BY and a HAVING clause on the query:

select empid
from t1
where skillid in (3, 4, 5) 
    or skillid in (4, 5, 6) 
group by empid
having count(distinct skillid) = 3

See SQL Fiddle with Demo