Use Access SQL to do a grouped ranking

Question

How do I rank salespeople by # customers grouped by department (with ties included)?

For example, given this table, I want to create the Rank column on the

Answer 1

Great solution with subquery! Except for huge recordsets, the subquery solution gets very slow. Its better(quicker) to use a Self JOIN, look at the folowing solution: self join

SELECT tbl1.SalesPerson , count(*) AS Rank 
FROM tbl AS tbl1 INNER JOIN tbl AS tbl2 ON tbl1.DEPT = tbl2.DEPT 
    AND tbl1.#Customers < tbl2.#Customers 
GROUP BY tbl1.SalesPerson