如何從左連接中的嵌套子查詢中檢索列？

我有一個存儲過程，我必須從嵌套的子查詢中檢索一列。我知道如何獲得它，如果它只嵌套一次，但對於我的這種情況，我需要顯示的列是雙重嵌套。如何從左連接中的嵌套子查詢中檢索列？

SELECT a.vendor, 
a.last, 
MaxInv 
FROM 
    (
    SELECT vendor, day 
    FROM tblvendor) a 

    LEFT JOIN (SELECT vendor, tblarinv.arinv, tblardetail.arddate 
    Sum([MaxQty]*[ActualCost]) AS MaxInv, 
    FROM tblarinv 
    INNER JOIN tblardetail 
    ON tblarinv.id= tblardetail.id)  
group by a.vendor,a.last

在上面的例子中，我必須從左連接LEFT JOIN (SELECT vendor,tblarinv.arinv, tblardetail.arddate檢索兩列。最初，select語句中只有供應商，但因爲我需要tblarinv.arinv, tblardetail.arddate，所以我在左連接中的select語句中添加了它們。然後，當我嘗試在第一個SELECT語句中添加此字段時，它不會識別錯誤提示'多部分標識符無法綁定'。任何人都可以幫助我嗎？

這裏是我的編輯查詢：

SELECT 
a.Vendor, 
,CASE WHEN sum(GP)<>0 THEN GP ELSE 0 END GP 
,a.ThreeMonths 
,CASE WHEN sum(GP)<>0 THEN GP/@WorkDaysElapsed ELSE 0 END AS AvgDailyGP 
,CurrentInv 
,MaxInv 
,Inventory_Variance 

FROM 
(Select Vendor, sum(GrossProfit) ThreeMonths, 
    (Select sum(GrossProfit) From dbo.MonthlySales with (nolock) Where EndOfMonth Between dateadd(m,-3,@First) and @First-1) as AllThreeMonths 
    FROM MonthlySales with (nolock) 
    Where EndOfMonth>=dateadd(m,-3,@First) 
    Group By Vendor 
    Having sum(GrossProfit)<>0) a 

LEFT JOIN (Select tblMaterial.Vendor, tblARDetail.ARInvoiceID, tblARDetail.ARInvoiceDetailID, tblARInv.ARInvoiceDate 
,(Sum(SplitAmount))-(Sum((CASE WHEN SplitAmount<0 THEN -1*ABS([Quantity]) ELSE ABS([Quantity]) END)*dbo.fn_CalculatePrice_Decimal(tblARDetail.UnitCost,tblARDetail.ProductDiscountPct))) AS GP 

      FROM tblARInv with (nolock) 
      INNER JOIN tblARDetail with (nolock) ON tblARDetail.ARInvoiceID = tblARInv.ARInvoiceID 
      INNER JOIN tblMaterial with (nolock) ON tblMaterial.MaterialID = tblARDetail.MaterialID 
      INNER JOIN [dbo].[tblCust] 
       ON [tblCust].[CustomerID] = [tblARInv].[CustomerID] 
      Where tblARInv.Date>= '' + cast(Month(GetDate()) as varchar(2)) + '/1/' + cast(year(GetDate()) as varchar(4)) + '' 
       AND [tblCust].[Status] != 8 --Internal 
      Group By tblMaterial.Vendor, tblARDetail.ARInvoiceID, tblARDetail.ARInvoiceDetailID, tblARInv.ARInvoiceDate) 
      ThisMonth ON ThisMonth.Vendor=a.Vendor 


Group By 
a.Vendor 
,GP 
,a.ThreeMonths 
,AllThreeMonths 
,CurrentInv 
,MaxInv 
,Inventory_Variance 
END

所以，我需要找回tblARDetail.ARInvoiceID, tblARDetail.ARInvoiceDetailID, tblARInv.ARInvoiceDate我加在上面編輯查詢。

來源

2017-04-18 toofaced

該查詢看起來不正確的。 'last'從哪裏來？你在'a'的連接和在'left join'後的未命名派生表在哪裏？你爲什麼要在未命名的派生表之外進行聚合而不是在其內部進行聚合？你的派生表中有'vendor'來自哪裏？ – SqlZim

這裏是一個開始的好地方。 http://spaghettidba.com/2015/04/24/how-to-post-a-t-sql-question-on-a-public-forum/ –

@SqlZim：我的查詢是複雜，所以我想給簡單的例子。對不起，我會嘗試正確編輯我的代碼。 – toofaced

有很多與您的示例查詢的問題，但第一部分是，如果*您不需要「鳥巢」加入，不這樣做。（這是一些人從微軟Access獲取的壞習慣，你必須使用那種混亂）。

你的僞查詢可以簡化到這樣的事情：

select 
    v.vendor 
    , v.last 
    , sum(d.[MaxQty]*d.[ActualCost]) as MaxInv 
from tblvendor v 
    left join tblarinv i 
    on v.vendor = i.vendor 
    left join tblardetail d 
    on i.id= d.id 
group by v.vendor, v.last

從你編輯的問題，它看起來並不像那些列嵌套，他們ThisMonth可被接合到a。

select 
    a.Vendor 
    , case when sum(GP) <> 0 then GP else 0 end GP 
    , a.ThreeMonths 
    , case when sum(GP) <> 0 then GP/@WorkDaysElapsed else 0 end as AvgDailyGP 
    , CurrentInv 
    , MaxInv 
    , Inventory_Variance 
    /* Include the desired columns in the select */ 
    , ThisMonth.ARInvoiceID 
    , ThisMonth.ARInvoiceDetailID 
    , ThisMonth.ARInvoiceDate 
from (
    select 
     Vendor 
    , sum(GrossProfit) ThreeMonths 
    , (
     select sum(GrossProfit) 
     from dbo.MonthlySales with (nolock) 
     where EndOfMonth between dateadd(month, - 3, @First) and @First - 1 
    ) as AllThreeMonths 
    from MonthlySales with (nolock) 
    where EndOfMonth >= dateadd(month, - 3, @First) 
    group by Vendor 
    having sum(GrossProfit) <> 0 
) a 
left join (
    select 
     tblMaterial.Vendor 
    , tblARDetail.ARInvoiceID 
    , tblARDetail.ARInvoiceDetailID 
    , tblARInv.ARInvoiceDate 
    , (Sum(SplitAmount)) 
     - (Sum((case when SplitAmount < 0 then - 1 * ABS([Quantity]) else ABS([Quantity]) end) * dbo.fn_CalculatePrice_Decimal(tblARDetail.UnitCost, tblARDetail.ProductDiscountPct))) 
     as GP 
    from tblARInv with (nolock) 
    inner join tblARDetail with (nolock) 
    on tblARDetail.ARInvoiceID = tblARInv.ARInvoiceID 
    inner join tblMaterial with (nolock) 
    on tblMaterial.MaterialID = tblARDetail.MaterialID 
    inner join [dbo].[tblCust] 
     on [tblCust].[CustomerID] = [tblARInv].[CustomerID] 
    where [tblCust].[Status] != 8 --Internal 
    -- and tblARInv.date >= '' + cast(Month(GetDate()) as varchar(2)) + '/1/' + cast(year(GetDate()) as varchar(4)) + '' 
    /* easier way to get start of the month */ 
    and tblARInv.date >= dateadd(month, datediff(month, 0, getdate()) , 0) 
    group by tblMaterial.Vendor 
    , tblARDetail.ARInvoiceID 
    , tblARDetail.ARInvoiceDetailID 
    , tblARInv.ARInvoiceDate 
) ThisMonth on ThisMonth.Vendor = a.Vendor 
left join (
select Vendor 
    , Sum(case when [InStock] > [MaxQty] then [MaxQty] * [ActualCost] else [Instock] * [ActualCost] end) as CurrentInv 
    , Sum([MaxQty] * [ActualCost]) as MaxInv 
    , ((Sum(case when [InStock] > [MaxQty] then [MaxQty] * [ActualCost] else [Instock] * [ActualCost] end)/Sum(case when [MaxQty] * [ActualCost] <> 0 then [MaxQty] * [ActualCost] else 1 end)) - 0.75)/0.75 as Inventory_Variance 
from tblMaterial with (nolock) 
where (((MaxQty) > 0)) 
group by Vendor 
) as Inventory on Inventory.Vendor = a.Vendor 
group by 
    a.Vendor 
    , GP 
    , a.ThreeMonths 
    , AllThreeMonths 
    , CurrentInv 
    , MaxInv 
    , Inventory_Variance 
    /* Include the desired columns in the group by too */ 
    , ThisMonth.ARInvoiceID 
    , ThisMonth.ARInvoiceDetailID 
    , ThisMonth.ARInvoiceDate 
end

參考：

來源

2017-04-18 16:11:54 SqlZim

我在帖子中編輯了我的查詢。感謝您的僞查詢;然而，它是我的問題中的雙重嵌套查詢。根據xQbert，如果它不止一個級別，它就不能被訪問。 – toofaced

@toofaced更新了我的答案，以便用您的實際查詢編輯 – SqlZim

是的，當我再次瀏覽他們時，我意識到了這一點。謝謝你的幫助。 – toofaced

如何從左連接中的嵌套子查詢中檢索列？

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