Sql如何将前一行的值添加到下一行 [英] Sql how to add value from previous row into the next

问题描述

I am trying to add the value of the previous row to the current row into the column cumulative

Select 
    Ddate as Date, etype, Reference, linkacc as ContraAcc,
    Description,
    sum(case when amount > 0 then amount else 0 end) as Debits,
    sum(case when amount < 0 then amount else 0 end) as Credits,
    sum(amount) as Cumulative
from
    dbo.vw_LT
where
    accnumber ='8400000' 
    and [DDate] between '2016-04-01 00:00:00' and '2016-04-30 00:00:00'
    and [DataSource] = 'PAS11CEDCRE17'
group by 
    Ddate, etype, Reference, linkacc, Description, Amount
Output:

Date        Reference   ContraAcc   Description Debits  Credits Cumulative 
--------------------------------------------------------------------------
2016-04-01     CC007    8000000     D/CC007      0      -39.19    -39.19
2016-04-01     CC007    8000000     D/CC007     1117.09     0     1117.09
2016-04-01     CC009    8000000     CC009       2600        0       2600

在累积列第二行必须是-39.19 + 1117.09等等



我尝试过：



i试图使用声明总和（金额）作为累积，但它正在提供相同的值。

in the cumulative column row two must be -39.19 + 1117.09 and so on

What I have tried:

i have tried to use the statement sum(amount) as Cumulative but it is brining the same value.

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