How to add a few restrictios to a query?

Question

I have difficulty with syntax...

This is my query:

SELECT t.diapason,
       Count(*) AS \'number_of_users\'
FROM   (SELECT CASE
                 WHEN a         


        

Answer 1

You add WHERE clause to filter.

SELECT t.diapason,
       COUNT(*) AS 'number_of_users'
FROM (
    SELECT 
        CASE
            WHEN amount < 200 THEN '0-200'
            WHEN amount >= 200 THEN '200 +'
        END AS diapason
    FROM   (
        SELECT payments.user_id, SUM(amount) AS amount
        FROM   payments
        INNER JOIN activity ON payments.user_id = activity.user_idAND activity.login_time = payments.payment_time
        WHERE activity.login_time BETWEEN '2018-01-10' AND '2018-01-12'
        GROUP  BY payments.user_id
    ) p
) t
GROUP  BY t.diapason
ORDER  BY number_of_users DESC;