他の列の値のチェックでSql条件付き合計計算

Question

私は次のSQLクエリがあります。

SELECT (SELECT ISNULL(SUM(Qty),0) 
From Bills 
JOIN BillMaster on Bills.BillNumber = BillMaster.BillNumber 
where SessionID = '" + DBHandler.SessionID(Date) + "' 
and BillMaster.ShiftID = " + SHiftID + " 
and Bills.ProductID = products.id) [qty], 
products.price , products.name 
FROM products. 

"請求書"の表には "isDeal"という列があります。私はその合計が "isDeal" = 0のときにのみ実行されることを望む カラム "isDeal"があることがわかるBillsテーブルのスクリーンショット と出力レポートを添付しています。isDeal = 0 then sum計算するべきでない他の賢明な合計を計算する これをどのように計算できますか？

Answer 1

はこれを試してみてください。

SELECT 
    isnull((
    SELECT SUM(Qty) 
    From Bills 
    inner JOIN BillMaster on Bills.BillNumber = BillMaster.BillNumber 
    where SessionID = '" + DBHandler.SessionID(Date) + "' 
    and BillMaster.ShiftID = " + SHiftID + " 
    and Bills.ProductID = products.id and isdeal=0 
    ), 0) [qty], 
products.price , products.name 
FROM products 

Answer 2

クエリの下に使用してください：

SELECT (SELECT ISNULL(SUM(
CASE 
    WHEN IsDeal =0 THEN Qty 
    ELSE 0 
END,0) 
),0) 
From Bills 
JOIN BillMaster on Bills.BillNumber = BillMaster.BillNumber 
where SessionID = '" + DBHandler.SessionID(Date) + "' 
and BillMaster.ShiftID = " + SHiftID + " 
and Bills.ProductID = products.id) [qty], 
products.price , products.name 
FROM products 

Answer 3

他の方法：

SELECT ISNULL(f2.Qty, 0) qty, f1.price , f1.name 
FROM products f1 
outer apply 
(select SUM(Qty) qty 
    From Bills 
    inner JOIN BillMaster on Bills.BillNumber = BillMaster.BillNumber 
    where SessionID = '" + DBHandler.SessionID(Date) + "' 
    and BillMaster.ShiftID = " + SHiftID + " 
    and Bills.ProductID = f1.id and IsDeal =0 
) f2 

Answer 4

使用条件集約isDeal上：

SELECT 
    (SELECT ISNULL(SUM(CASE WHEN isDeal = 0 THEN Qty ELSE 0 END), 0) 
    FROM Bills t1 
    INNER JOIN BillMaster t2 
     ON t1.BillNumber = t2.BillNumber 
    WHERE SessionID = '" + DBHandler.SessionID(Date) + "' AND 
      t2.ShiftID = " + SHiftID + " AND 
      t1.ProductID = products.id 
    ) [qty], 
    products.price, 
    products.name 
FROM products