計算SQL中的平均每日餘額

Question

從表開始;

[AccountLedger] 

AccountCode PostingDate   Amount  
128   2014-01-01 08:36:09 200.00 
128   2014-01-01 14:18:10 200.00 
128   2014-01-01 14:26:56  0.00 
128   2014-01-01 18:17:31 400.00 
128   2014-01-01 20:18:53 100.00 
128   2014-01-02 00:10:35  0.00 
128   2014-01-02 01:44:26 300.00 
128   2014-01-02 15:49:31 -300.00 
128   2014-01-03 00:33:23 400.00 
128   2014-01-03 11:55:13 -200.00 
128   2014-01-03 11:56:34 -100.00 
128   2014-01-03 14:58:42 -400.00  
128   2014-01-03 17:31:11  0.00 

**REQUIRED RESULT** 

AccountCode PostingDate   daily_balance 
128   2014-01-01   900.00 
128   2014-01-02   900.00 
128   2014-01-03   600.00 

查詢被附加

select 
     Acc 
    , Dte 
    , sum(daily_amt) over (PARTITION BY Acc ORDER BY Dte DESC) as daily_balance 
from (select 
      [AccountLedger].[AccountCode] as Acc 
      , convert(date, [AccountLedger].[PostingDate]) as Dte 
      , sum([AccountLedger].[Amount]) as daily_amt 
     from [AccountLedger] 
     WHERE [AccountLedger].[PostingDate] < '2014-04-01' 
     and [AccountLedger].[AccountCode]=128 

     group by [AccountLedger].AccountCode 
     , [AccountLedger].[PostingDate] 

    ) t 
     order by Acc, dte* 

*但出現錯誤;

Msg 102, Level 15, State 1, Line 4 
Incorrect syntax near 'order'. 
Msg 102, Level 15, State 1, Line 16 
Incorrect syntax near 't'.* 

我該如何得到需要的結果？

Answer 1

用一個簡單的日期表（或在我的情況下，UDF生成日期範圍）

Declare @DateR1 Date,@DateR2 Date 
Set @DateR1 = '2014-01-01' 
Set @DateR2 = '2014-01-31' 


Select AccountCode 
     ,PostingDate=Date2 
     ,DailyBalance=sum(amount) 
From #Temp A 
Join (Select Date1=@DateR1,Date2=cast(RetVal as Date) from [dbo].[udf-Create-Range-Date](@DateR1,@DateR2,'DD',1)) B on cast(PostingDate as Date) between Date1 and Date2 
Group By AccountCode,Date2 
Order By 1 

返回

AccountCode PostingDate DailyBalance 
128   2014-01-01 900 
128   2014-01-02 900 
128   2014-01-03 600 
128   2014-01-04 600 
128   2014-01-05 600 
128   2014-01-06 600 
... 
128   2014-01-31 600 

的UDF

SET ANSI_NULLS ON 
GO 
SET QUOTED_IDENTIFIER ON 
GO 

CREATE FUNCTION [dbo].[udf-Create-Range-Date] (@DateFrom datetime,@DateTo datetime,@DatePart varchar(10),@Incr int) 

Returns 
@ReturnVal Table (RetVal datetime) 

As 
Begin 
    With DateTable As (
     Select DateFrom = @DateFrom 
     Union All 
     Select Case @DatePart 
       When 'YY' then DateAdd(YY, @Incr, df.dateFrom) 
       When 'QQ' then DateAdd(QQ, @Incr, df.dateFrom) 
       When 'MM' then DateAdd(MM, @Incr, df.dateFrom) 
       When 'WK' then DateAdd(WK, @Incr, df.dateFrom) 
       When 'DD' then DateAdd(DD, @Incr, df.dateFrom) 
       When 'HH' then DateAdd(HH, @Incr, df.dateFrom) 
       When 'MI' then DateAdd(MI, @Incr, df.dateFrom) 
       When 'SS' then DateAdd(SS, @Incr, df.dateFrom) 
       End 
     From DateTable DF 
     Where DF.DateFrom < @DateTo 
    ) 

    Insert into @ReturnVal(RetVal) Select DateFrom From DateTable option (maxrecursion 32767) 

    Return 
End 

-- Syntax Select * from [dbo].[udf-Create-Range-Date]('2016-10-01','2020-10-01','YY',1) 
-- Syntax Select * from [dbo].[udf-Create-Range-Date]('2016-10-01','2020-10-01','DD',1) 
-- Syntax Select * from [dbo].[udf-Create-Range-Date]('2016-10-01','2016-10-31','MI',15) 
-- Syntax Select * from [dbo].[udf-Create-Range-Date]('2016-10-01','2016-10-02','SS',1) 

Answer 2

查詢作品精細。但它不會做你想要的，因爲你是按日期時間字段進行分組的，2014-01-01 00:00:00與2014-01-01 00:00:01不同。

這是一款基於日

SELECT [AccountCode] ,cast([PostingDate] as date) as date ,sum([Amount]) as 'daily balance' FROM [AccountLedger] WHERE [PostingDate] < '2014-04-01' GROUP BY [AccountCode], cast([PostingDate] as date)

讓我知道，如果這個工程總金額相當簡單的方式。

Answer 3

select 
    AccountCode, 
    convert(date, PostingDate) AS PostingDate, 
    avg(Amount) as Average 
from 
    AccountLedger 
where 
    PostingDate < '2014-04-01' 
group by 
    AccountCode, 
    convert(date, PostingDate) 

http://sqlfiddle.com/#!6/965ec/19