來自XML的SQL更新始終返回空值

Question

我有一些問題，我從互聯網上獲取此代碼，並將其改爲供我自己使用。我運行示例，它工作正常，沒有問題。在我改變它爲我的程序後，它不顯示任何錯誤，只是0行受影響。結果，xml列沒有任何返回。我希望得到一些提示。

declare @input XML 

set @input = '<?xml version="1.0" standalone="yes"?> 
<NewDataSet> 
    <CurrencyTransact> 
<BCurrencyCode>USD</BCurrencyCode> 
<StockBalance>18000.00</StockBalance> 
</CurrencyTransact> 
<CurrencyTransact> 
<BCurrencyCode>MYR</BCurrencyCode> 
<StockBalance>30000.00</StockBalance> 
</CurrencyTransact> 

'

;with GrabXML AS 
(
    select 
     CurrencyBal.value('@BCurrencyCode', 'varchar(10)') as 'BCurrencyCode', 
     CurrencyBal.value('@StockBalance', 'decimal(18,2)') as 'StockBalance' 
     from 
     @input.nodes('/NewDataSet/CurrencyTransact') as n(CurrencyBal) 
) 

update dbo.Currency 
set StockBalance = g.StockBalance 
from GrabXML g 
where dbo.Currency.CurrencyCode = g.BCurrencyCode 

Answer 1

我只是改變了這一行，使其works.Problem解決！

CurrencyBal.value('(BCurrencyCode)[1]', 'varchar(10)') as 'BCurrencyCode', 
    CurrencyBal.value('(StockBalance)[1]', 'decimal(18,2)') as 'StockBalance'