在單個查詢中按多個日期范圍聚合列

Question

我有一個包含5列的MySQL表：

Device | Name | Date | Source | Income

設備 ， 名稱和來源都不是唯一的。

我正在嘗試編寫SQL以獲取以下內容：

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

做這個的最好方式是什么？

Answer 1

您可以通過CASE語句獲取條件SUM() ：

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