Question

I have a situation in which i need to group the applicant based on some column value
(shown below) and find the count of that group.
Currently the query is returning only those columns which has a count of more than 0.

What modification should be done to the query so that it shows all groups and its counts as zero?

Query:

select Applicant_info.range as [Income Range], count(*) as [Total Students],order_number =
          CASE range
             WHEN 'Did not specify' THEN '1'
             WHEN '0-25000' THEN '2'
             WHEN '25001-50000' THEN '3'
             WHEN '50001-75000' THEN '4'
             WHEN '75001-100000' THEN '5'
             WHEN '100001-200000' THEN '6'
             WHEN '200000 and Above' THEN '7'
          END
    from (
      select case  
        when Annual_Income is null or Annual_Income = '' then 'Did not specify' 
        when Annual_Income between 0 and 25000 then '0-25000'
        when Annual_Income between 25001 and 50000 then '25001-50000'
        when Annual_Income between 50001 and 75000 then '50001-75000'
        when Annual_Income between 75001 and 100000 then '75001-100000'
        when Annual_Income between 100001 and 200000 then '100001-200000'
        when Annual_Income > 200000 then '200000 and Above'
        end as range
      from Applicant_info)Applicant_info
    group by Applicant_info.range
    order by order_number

Answer 1

Use a separate CASE expression for each one like this:

Select 
  range as [Income Range], 
  SUM(CASE when Annual_Income is null or Annual_Income = '' then END) AS 'Did not specify',
  SUM(CASE when Annual_Income between 0 and 25000 then 1 ELSE 0 END) AS '0-25000',
  SUM(CASE when Annual_Income between 25001 and 50000 then 1 ELSE 0 END) AS '25001-50000',
  SUM(CASE when Annual_Income between 50001 and 75000 then 1 ELSE 0END) AS  '50001-75000',
  SUM(CASE when Annual_Income between 75001 and 100000 then 1 ELSE 0 END) AS  '75001-100000',
  SUM(CASE when Annual_Income between 100001 and 200000 then 1 ELSE 0END) AS  '100001-200000',
  SUM(CASE when Annual_Income > 200000 then 1 ELSE 0 END) AS  '200000 and Above'
from Applicant_info
GROUP BY range;

Note that: This SUM function is actually a count, because it sums either 0 or 1.