I want to count total rows of particular condition and use that value in case condition.
What am i doing wrong here?
Please help…

        select count(*) as total 
        CASE 
            when total > 3
            Then 
                'true'
            else

                'false'
        end as result
        from friendship where userId = '1' 

>Solution :

You cannot refer to column aliases within the same select statement, the expressions are not evaluated in a "left to right" order.

Simply repeat the expression:

select Count(*) as total, 
  case when Count(*) > 3 then 'true' else 'false' end as result
from friendship 
where userId = 1;