Question

I have following table structure:

uid    | product_code
---------------------
00001  | 'tb'
00001  | 'im' 
00001  | 'ip'
00002  | 'tb'
00002  | 'im'

I want a selfjoin query that will show me those uids which have all three product codes ‘mg’,’ip’,’tb’ with them. i.e only 00001 will be displayed. How can it be done?

Answer 1

SELECT sj1.uid FROM tbl sj1 
    JOIN tbl sj2 ON sj1.uid = sj2.uid 
    JOIN tbl sj3 ON sj1.uid = sj3.uid
WHERE sj1.product_code = 'tb'
    AND sj2.product_code = 'im'
    AND sj3.product_code = 'mg'

should work also if you have more product codes.