SQL Serverクエリは、私は複数の表を結合されたSQLのクエリを持って重複行

Question

を返す、それが重複行を返すと、それを通過する時間後にされると、そのが間違っ

SELECT 
    StkItem.iUOMStockingUnitID, 
    _etblUnits1.cUnitCode as 'parkSize', 
    _etblUnits2.cUnitCode as 'quantitySize', 
    InvNum.fInvTotExclForeign, 
    [_btblInvoiceLines].*, 
    [_rtblCountry].cCountryName, 
    [CurrencyHist].fBuyRate, 
    Vendor.Name, 
    InvNum.OrderDate, 
    InvNum.InvNumber 
FROM 
    [dbo].[_btblInvoiceLines] 
LEFT JOIN 
    StkItem ON StkItem.StockLink = [_btblInvoiceLines].iStockCodeID 
LEFT JOIN 
    _etblUnits as _etblUnits1 ON _etblUnits1.idunits = StkItem.iUOMDefSellUnitID 
LEFT JOIN 
    _etblUnits as _etblUnits2 ON _etblUnits2.idunits = StkItem.iUOMStockingUnitID 
LEFT JOIN 
    InvNum ON iInvoiceID = AutoIndex 
LEFT JOIN 
    Vendor ON Vendor.DCLink = InvNum.AccountID 
LEFT JOIN 
    [_rtblCountry] ON [_rtblCountry].idCountry = Vendor.iCountryID 
LEFT JOIN 
    [CurrencyHist] ON InvNum.ForeignCurrencyID = [CurrencyHist].iCurrencyID 
WHERE 
    OrderNum = '' 
    AND [CurrencyHist].iCurrencyID = (SELECT TOP 1 iCurrencyID 
             FROM [CurrencyHist] 
             WHERE iCurrencyID = InvNum.ForeignCurrencyID 
             ORDER BY idCurrencyHist DESC) 

行く場所を見つけることができません

ここではクエリですが、どんな助けもありがとうございます。ありがとうございます。

Answer 1

あなたの前のコメントから、[CurrencyHist]に参加すると問題が発生しています。名前から見ると、それは履歴テーブルなので、各通貨の履歴として複数の行を持つ必要があります。重複行を排除するには、特定の通貨の最新の更新レコードに参加する必要があります。だから、あなたのクエリが

SELECT StkItem.iUOMStockingUnitID, 
      _etblUnits1.cUnitCode as 'parkSize', 
      _etblUnits2.cUnitCode as 'quantitySize', 
      InvNum.fInvTotExclForeign, 
      [_btblInvoiceLines].*, 
      [_rtblCountry].cCountryName, 
      [CurrencyHist].fBuyRate, 
      Vendor.Name, 
      InvNum.OrderDate, 
      InvNum.InvNumber 
    FROM [dbo].[_btblInvoiceLines] 
    LEFT JOIN StkItem ON StkItem.StockLink = [_btblInvoiceLines].iStockCodeID 
    LEFT JOIN _etblUnits as _etblUnits1 ON _etblUnits1.idunits = StkItem.iUOMDefSellUnitID 
    LEFT JOIN _etblUnits as _etblUnits2 ON _etblUnits2.idunits = StkItem.iUOMStockingUnitID 
    LEFT JOIN InvNum ON iInvoiceID = AutoIndex 
    LEFT JOIN Vendor ON Vendor.DCLink = InvNum.AccountID 
    LEFT JOIN [_rtblCountry] ON [_rtblCountry].idCountry = Vendor.iCountryID 
    LEFT JOIN (SELECT DENSE_RANK() over (partition by [CurrencyHist].iCurrencyID order by [CurrencyHist].LastUpdated desc) as rn,[CurrencyHist].iCurrencyID as 'iCurrencyID' 
    FROM [CurrencyHist] AS [CurrencyHist] 
    )[CurrencyHist] ON InvNum.ForeignCurrencyID = [CurrencyHist].iCurrencyID 
    and [CurrencyHist].rn=1 
WHERE OrderNum = '' AND 
[CurrencyHist].iCurrencyID = (SELECT TOP 1 iCurrencyID 
             FROM [CurrencyHist] 
             WHERE iCurrencyID = InvNum.ForeignCurrencyID 
             ORDER BY idCurrencyHist DESC) 

注、以下のようなことができます：私はCurrencyHistの表は、ネストされたクエリで