This will do what you want (list of towns, with the number of users in each):
select town, count(town)
from user
group by town
You can use most aggregate functions when using GROUP BY
:
(COUNT
, MAX
, COUNT DISTINCT
etc.)
Update (following change to question and comments)
You can declare a variable for the number of users and set it to the number of users then select with that.
DECLARE @numOfUsers INT
SET @numOfUsers = SELECT COUNT(*) FROM user
SELECT DISTINCT town, @numOfUsers
FROM user