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

You could try something like the following (assuming you have a candidate table and my assumption of table/column names are correct).

SELECT c FROM (
 SELECT "Candidate"."candidate_id" as id, 
 count("Applications"."candidate_id") as c
 FROM "Candidate" LEFT JOIN "Applications" 
 ON "Applications"."candidate_id"="Candidate"."id"     
GROUP BY "Candidate"."candidate_id" ) as s WHERE id= _SOME_ID_;