return count 0 with mysql group by

Question

database table like this

============================
= suburb_id   |   value
= 1           |    2
= 1           |    3
= 2           |    4
= 3           |          


        

Answer 1

Query:

select case
         when total is null then 0
         else total
       end as total_with_zeroes,
       suburb_id
from (SELECT COUNT(suburb_id) AS total, suburb_id 
        FROM suburbs 
       where suburb_id IN (1,2,3,4) 
    GROUP BY suburb_id) as dt