Question

Ive got the follow sql which counts how many actors have more than 1 role based on actorID

SELECT COUNT (actorID) 
from ROLE
GROUP BY actorID
HAVING COUNT (actorID) > 3;

It gives me the followin result which is correct

COUNT(ACTORID)
         4
         5
         4
         4

However I WANT it to give me the total of 4 (4 actors have more than 3 film roles)

Answer 1

You have to do this in two steps.

First, identify the actors with more than 3 films, as you have done. Then count those records in a separate query…

SELECT
  COUNT(*)
FROM
(
  SELECT   actorID
  FROM     ROLE
  GROUP BY actorID
  HAVING   COUNT(*) > 3
)
  AS actors