在單個查詢

Question

彙總多個日期範圍一欄我有一個MySQL表有5列：

Device | Name | Date | Source | Income 

無論設備也不名稱也不來源是唯一的。

我想寫用於獲取SQL如下：

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

什麼是做到這一點的最好方法是什麼？

Answer 1

你可以得到一個通過CASE語句條件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