Question

I have two different queries that have produced the correct result, but I would like to have them produce the answer out in one table. How do I do that?

Here is my code:

SELECT count(distinct ID) as NoOfEmployees
FROM Table_Name
WHERE date<= '2012-05-31';

select count(subA.ID) as EmployeesChanged from (
SELECT A.ID 
FROM Table_Name A 
WHERE A.date < '2012-06-01' 
GROUP BY 1 
HAVING COUNT(A.Service_type) > 1 ) subA

Currently I have the following output:

Number of Employees
x

Employees Changed
x

How do I make it

Number of Employees |  Employees Changed  | (Number of employees - number changed)
x                   |             x       |            x

Answer 1

I don’t know what database do you use. But for some databases you can try:

select q1.Value, q2.Value, q1.Value - q2.Value from
  (SELECT count(distinct ID) as Value FROM Table_Name 
    WHERE date<= '2012-05-31') q1,
  (select count(subA.ID) as Value from 
      ( SELECT A.ID FROM Table_Name A 
        WHERE A.date < '2012-06-01' GROUP BY 1 
        HAVING COUNT(A.Service_type) > 1 ) subA) q2