如何使用動態，如果在SQL

條件我有一個SQL查詢如下如何使用動態，如果在SQL

select TransactionMode as [Modes], 
TransactionCode as [Codes], 
TransactionAmount as [Amount],SubTotal,Total 
from TransactionDetails where CurrentTime> CAST(GETDATE()as date)

它給O/P如下

Modes  Codes  Amount  SubTotal  Total 
    CARDS  ICICI  12   13.18  13.18 
    CARDS  ICICI  200  219.7  219.7 
    CARDS  ICICI  500  549.25  549.25 
    BUY   COD  7000  42.898  38.67 
    CARDS  SBI  400  439.4  439.4

我想計算TransactionMode列的基礎上，委託我試過我的查詢如下

Declare @TransactionMode varchar(250); 
set @TransactionMode='select TransactionMode from TransactionDetails' 

IF @TransactionMode = 'CARDS' 
    select transactioncode as [Type], count(TransactionCode) as [No of Trans], SUM(Total) as [Amount], 
ABS(SUM(Subtotal-TransactionAmount)) as [Comission] from dbo.TransactionDetails where CurrentTime> CAST(GETDATE()as date) and 
    Status='Active' group by transactioncode 

ELSE 
    select transactioncode as [Type], count(TransactionCode) as [No of Trans], SUM(Total) as [Amount], 
ABS(SUM(Subtotal-Total)) as [Comission] from dbo.TransactionDetails 
    where CurrentTime> CAST(GETDATE()as date) 
    and Status='Active' group by transactioncode

我期待o/p爲

Type No Of Trans Amount Comission 
COD  1   38.67  4.228 
ICICI  3   782.13  70.13 
SBI  1   439.4  39.4

相反，我得到

Type No Of Trans Amount Comission 
COD  1   38.67  4.228 
ICICI  3   782.13  0 
SBI  1   439.4  0

我哪裏錯了？

來源

2015-10-12 Sabyasachi Mishra

查詢似乎按照T-sql，它是給出正確的輸出。你必須看看有些東西>如果輸出不正確，那麼你的where條件有什麼問題。這是正確的ABS（SUM（SubTotal-TransactionAmount））as [ [作業] .OR或者公式錯誤 – KumarHarsh

我嘗試過使用'ABS（SUM（SubTotal-TransactionAmount））作爲[Comission]'和SU M（Subtotal-TransactionAmount）作爲[Comission]'，但得到相同的結果:( –

'設置@ TransactionMode ='從TransactionDetails''選擇TransactionMode'因爲@ TransactionMode'永遠不會等於'CARDS'，你總是會執行else條件，因爲''從TransactionDetails'中選擇TransactionMode是一個字符串而不是select語句，子查詢也會返回多個值。 – Prabhat

以下是您的錯誤：您使用字符串'從TransactionDetails中選擇TransactionMode'填充變量@TransactionMode。這永遠不會等於'卡'，所以你總是執行ELSE分支。

而是看一個創紀錄的交易模式：（abs(sum(a-b))似乎很奇怪，順便把公式應該不是重要的結果是積極的還是消極的？）

select 
    transactioncode as [Type], 
    count(transactioncode) as [No of Trans], 
    sum(total) as [Amount], 
    abs(sum(case when transactionmode = 'cards' then subtotal - transactionamount 
               else subtotal - total end)) as [Comission] 
from dbo.transactiondetails 
where currenttime > cast(getdate() as date) 
and status = 'active' 
group by transactioncode;

來源

2015-10-12 06:50:47

這完美的作品。 –

哇！被抓住了，但查詢中沒有錯誤。我全力關注查詢。 – KumarHarsh

如何使用動態，如果在SQL

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