寻找最大的收入日

Question

I have a table revenue with following fields

+----+-----------+-------------+---------------+
| id | member_id | amount_paid | datetime_paid |
+----+-----------+-------------+---------------+

I want to run a query to find the top 10 maximum revenue days. What would be the fastest way to achieve this? The table has a lot of data.

Regards,

Answer 1

Try the basic query which does it:

SELECT DATE(`datetime_paid`) AS `Max Revenue`
    FROM `revenue`
    ORDER BY `amount_paid` DESC
    GROUP BY DATE(`datetime_paid`)
    LIMIT 10;

This shows you the Top 10 Max paid days. :)

Answer 2

Assuming your datetime_paid column is of some date or time type ( see MySQL docu ), the following should work.

SELECT SUM( `amount_paid` ) AS `amount`, DATE( `datetime_paid` ) as `date`
  FROM yourTable
  GROUP BY `date`
  ORDER BY `amount` DESC
  LIMIT 10

Answer 3

First you need to group the results by the day the payment was made. This can be done by selecting DATE(datetime_paid) as payday , then grouping by payday . To get the total, select SUM(amount_paid) as total . Finally, to get the top 10, order by total desc and limit 10 .

Your final query should look like:

SELECT DATE(`datetime_paid`) AS `payday`, SUM(`amount_paid`) AS `total`
FROM `table_name_here`
GROUP BY `payday`
ORDER BY `total` DESC
LIMIT 10

You may need to change that ORDER BY line to ORDER BY SUM(amount_paid) DESC , I can't remember if field aliases are allowed in ordering.