Count number of records returned by group by

Question

How do I count the number of records returned by a group by query,

For eg:

select count(*) 
from temptable
group by column_1, column_2, column_3, co         


        

Answer 1

A CTE worked for me:

with cte as (
  select 1 col1
  from temptable
  group by column_1
)

select COUNT(col1)
from cte;