Get 0 value from a count with no rows

Question

I have SELECT:

SELECT c FROM (
    SELECT "candidate_id" as id, count("candidate_id") as c
    FROM "Applicaions"
    GROUP BY &         


        

Answer 1

Can't you use this statement:

SELECT count("candidate_id") as c
FROM "Applicaions" WHERE "candidate_id"=_SOME_ID_
GROUP BY "candidate_id"

It should return count() and you don't need subquery.

EDIT: Matthew PK is correct and Andy Paton has better answer ;)