如何在sql server中对数据进行分组

Question

我使用下面的代码：根据月份和帐户名称获取数据。

SELECT
CONVERT(Date,JD.CreatedDateTime) as Dated,
 DATENAME(Month,JD.CreatedDateTime) as [Month],
A.AccountName as [Account_Name],

Sum(JD.credit + JD.Debit) as Amount
FROM AccountGroup AG
INNER JOIN AccountType AT ON AG.AccountGroupID=AT.AccountGroupID
Right join Account A on A.AccountTypeID = AT.AccountTypeID 
Inner join JournalMasterDetail JD on JD.AccountID = A.AccountID
where AG.AccountGroupID =4  and JD.CreatedDateTime >=DATEADD(month,-12,DATEADD(day,DATEDIFF(day,0,GETDATE()),0))

group by 
A.AccountName,
JD.CreatedDateTime

但AccountName的子组无效...

我得到了这个结果：

期望的结果是：

Dated        Month      Account_Name         Amount
2014-03-01   February   Sales                910.00
2014-03-01   February   Services             350.00

2014-03-06   March      Sales                 69:99
2014-03-06   March      Cash Discount Given   44.99 

Answer 1

问题是您按日期时间字段进行分组，但仅显示日期部分。条目可以是相同的日期但是不同的时间。因为这些是不同的值。您需要按日期分组：

group by A.AccountName, CONVERT(Date,JD.CreatedDateTime)

或在CTE中准备查询，然后分组：

with cte as
(
  SELECT CONVERT(Date,JD.CreatedDateTime) as Dated, ...
)
select Dated, ... from cte group by Dated, ...