Question

Is there a better way to write

Select distinct id_no
from revenue_table
where (exists (select * from revenue_table i 
       where revenue_type = 'Shipping' and i.id_no = r.id_no)
  and exists(select * from revenue_table i 
       where revenue_type = 'Reproduction' and i.id_no = r.id_no)
  and exists(select * from revenue_table i 
       where revenue_type = 'Tape' and i.id_no = r.id_no))

id_no represents a form, which is entered into the table once for each revenue item on the form. Same revenue_type’s can appear multiple times. There are many advanced functions that work using OR logic but I cannot seem to find any functions using AND set theory. It would be really nice if GROUP BY had some function to compare a group such as id_no to a set like (Shipping, Reproduction, Tape)

Does this exist?

Answer 1

Another option would be

SELECT id_no
FROM   revenue_table
WHERE  revenue_type IN ( 'Tape', 'Shipping', 'Reproduction' )
GROUP  BY id_no
HAVING COUNT(DISTINCT revenue_type) = 3  

You’ll have to test whether or not it is an improvement.