打開庫存，股市收盤日期相關的SQL查詢

Question

我有兩個表主鍵和外鍵（MaterialId）

1. 材料表（多材料）

 
MaterialId MaterialName OpeningStock 
1   Pen   100 
2   Pencil   50 

材料庫存（多重材料輸入）

 
MaterialId PurchaseQty SalesQty Date 
1   500   0   2016-12-15 
1   0    0   2016-12-16 
1   300   0   2016-12-17 
1   0    400   2016-12-18 
1   0    0   2016-12-19 
1   0    0   2016-12-20 
1   0    400   2016-12-21 
1   200   100   2016-12-22 

現在，當我通過@FromDate和@Todate 我要輸出象下面這樣：

 
Date   MaterialName OpeningStock PurchaseQty SalesQty ClosingStock 
2016-12-15 Pen   100   500   0   600 
2016-12-16 Pen   600   0    0   600 
2016-12-17 Pen   600   300   0   900 
2016-12-18 Pen   900   0    400   500 
2016-12-19 Pen   500   0    0   500 
2016-12-20 Pen   500   0    0   500 
2016-12-21 Pen   500   0    400   100 
2016-12-22 Pen   100   200   100   200 

注：
1.如果事情是錯的數據庫表的話，請指導我如何處理這情況。 2.還可以從兩個表中查找當前日期庫存

Answer 1

您正在尋找各種數量值的滾動總和。這樣做的一種方法是使用相關子查詢：

SELECT 
    t1.Date, 
    mt.MaterialName, 
    (SELECT OpeningStock FROM [Material Table] WHERE MaterialId = t1.MaterialId) + 
    COALESCE((SELECT SUM(t2.PurchaseQty - t2.SalesQty) FROM [Material Stock] t2 
    WHERE t2.Date < t1.Date AND t1.MaterialId = t2.MaterialId), 0) AS OpeningStock, 
    t1.PurchaseQty, 
    t1.SalesQty, 
    (SELECT OpeningStock FROM [Material Table] WHERE MaterialId = t1.MaterialId) + 
COALESCE((SELECT SUM(t2.PurchaseQty - t2.SalesQty) FROM [Material Stock] t2 
    WHERE t2.Date <= t1.Date AND t1.MaterialId = t2.MaterialId), 0) AS ClosingStock 
FROM [Material Stock] t1 
INNER JOIN [Material Table] mt 
    ON t1.MaterialId = mt.MaterialId 
ORDER BY 
    mt.MaterialName, 
    t1.Date; 

注意，它是壞表的設計是從物料庫存表在一個單獨的表存儲期初存貨值。這意味着上述查詢將不會返回鉛筆記錄。更好的方法是將種子記錄插入到材料庫存中，對於每種材料，數量是初始庫存。

輸出：

演示在這裏：

Rextester

Answer 2

簡單地做如下：

SELECT S.DATE, M.MaterialName, M.OpeningStock, S.PurchaseQty, S.SalesQty, SUM((M.OpeningStock+S.PurchaseQty)-S.SalesQty)ClosingStock FROM #TABLE 
(
     SELECT * FROM MaterialTABLE 
) M 

INNER JOIN Material S ON S.MaterialId = M.MaterialId where s.date between @FromDate and @Todate