在单个查询中按多个日期范围聚合列

Question

I have a MySQL table with 5 columns:

Device | Name | Date | Source | Income

Neither Device nor Name nor Source are unique.

I am trying to write the SQL for getting the following:

Device | Name | Source | Income (for last 3 days) | Income (for last 9 days) | Income (for last 12 days)

What is the best way to do this?

Answer 1

You can get a conditional SUM() via CASE statements:

SELECT Device
      ,Name
      ,Source
      ,SUM(CASE WHEN date BETWEEN UNIX_TIMESTAMP(NOW() - INTERVAL 3 day) AND UNIX_TIMESTAMP(NOW()) THEN Income END) AS Last_3_Days
      ,SUM(CASE WHEN date BETWEEN UNIX_TIMESTAMP(NOW() - INTERVAL 9 day) AND UNIX_TIMESTAMP(NOW()) THEN Income END) AS Last_9_Days
FROM YourTable
GROUP BY Device
        ,Name
        ,Source   

Answer 2

SELECT COUNT(*) as total_l3d FROM table WHERE DATEDIFF(Date, NOW()) <= 3
UNION
SELECT COUNT(*) as total_l9d FROM table WHERE DATEDIFF(Date, NOW()) <= 9
UNION
SELECT COUNT(*) as total_l12d FROM table WHERE DATEDIFF(Date, NOW()) <= 12