How to use two keys in subquery

I can use a key in subquery, like
Select * from Employees where key1 in (Select key1,from SalesPerson)
But if I have two keys like
Select * from Employees where key1 and key2 in (Select key1, key2 from
SalesPerson..)
The above is wrong, but how can I do it?
Use EXISTS:
SELECT *
FROM employees AS e
WHERE EXISTS
(SELECT *
FROM salesperson AS P
WHERE P.key1 = E.key1
AND P.key2 = E.key2) ;
Or possibly using a join:
SELECT *
FROM employees AS e
JOIN salesperson AS P
ON P.key1 = E.key1
AND P.key2 = E.key2 ;
David Portas
SQL Server MVP