Question

tblticket

id issue status
1 test 1
2 test 2
3 test 3

i want to find count based on status 1,2,3 and so on

i write 3 sql statment as follows

select count(*) from ticket where status=1
select count(*) from ticket where status=2
select count(*) from ticket where status=3

any way to simplify this into single query

Answer 1

The simple answer is

select count(*), status
from ticket
group by status

However, this gives different results if you have no rows for a status because the behaviour documented here: Does COUNT(*) always return a result?

Assuming only 3 status values you’d do this:

select count(t.status), s.status
from
   (SELECT 1 AS status UNION  ALL SELECT 2 UNION  ALL SELECT 3) s
   LEFT JOIN
   ticket t ON s.status = t.status 
group by
   s.status

..or with a separate status lookup table:

select  count(t.status), s.status
from
   (SELECT DISTINCT status FROM status) s
   LEFT JOIN
   ticket t ON s.status = t.status 
group by
   s.status