Question

SELECT 
   Sum(Earning) AS Amount, 
   MONTH(DateCreated) AS Month 
FROM 
   TheTable 
WHERE 
   DateCreated 
BETWEEN 
   @DateFrom AND @DateTo 
GROUP BY **???**

我想显示每月的收入，如果它再次出现在明年，它不应该对月份进行分组，例如

五月，六月，七月，八月，九月，十月，十一月，十二月，一月，二月，三月，四月，五月，六月等。

如果年份不同，则应该继续列表而不进行分组，例如2015年5月和2016年5月。

谢谢

Answer 1

在select和group by：

中加入年份

SELECT YEAR(DateCreated) as Year, MONTH(DateCreated) AS Month, 
       Sum(Earning) AS Amount
FROM TheTable 
WHERE DateCreated BETWEEN @DateFrom AND @DateTo 
GROUP BY YEAR(DateCreated), MONTH(DateCreated)
ORDER BY YEAR(DateCreated), MONTH(DateCreated);

Answer 2

您可以按月使用功能（）

SELECT 
 Sum(Earning) AS Amount, 
 MONTH(DateCreated) AS Month 
FROM 
  TheTable 
WHERE 
  DateCreated 
BETWEEN 
   @DateFrom AND @DateTo 
GROUP BY  MONTH(DateCreated)

GROUP BY问题 - 每月分组

2 个答案: