SQL - 如果語句裏面有DateAdd

我對SQL非常陌生，但真的很享受它，並希望在它變得更好。SQL - 如果語句裏面有DateAdd

在我的代碼中，我將3個表合併在一起，然後爲該合併創建幾個列。我創建了一個「DaysOfStock」列，並希望將每列中的數字添加到當前日期。問題是「DaysOfStock」是一個「if」函數，我不確定如何將它添加到「DayAdd」函數中。我的代碼部分我有麻煩w /下面。

SELECT Cust.Article, 
    IsNull(stock.StockQuantity,0) StockQuantity, 
    IsNull(orders.OpenQty,0) OpenOrders, 
    IsNull(usage.[3MonUsage], 0) [3MonUsage], IsNull(usage.EAU, 0) [EAU], 
    ROUND(IsNull(usage.EAU, 0)/366,0) DailyUsage, 
    CASE WHEN IsNull(usage.EAU, 0)/366 = 0 THEN ROUND(IsNull(stock.StockQuantity,0)/(IsNull(orders.OpenQty, 0)/366),2) 
    ELSE ROUND(IsNull(stock.StockQuantity,0)/(IsNull(usage.EAU, 0)/366),2) END AS DaysOfStock 
    DateAdd(day, **DaysOfStock**, GetDate()) 
FROM TeslaArts 
     LEFT OUTER JOIN usage ON CustArts.Article = usage.Article 
     LEFT OUTER JOIN stock ON CustArts.Article = stock.Article 
     LEFT OUTER JOIN orders ON CustArts.Article = orders.Article 
WHERE (orders.OpenQty > 0 AND usage.[3MonUsage] > 0) 
    OR (orders.OpenQty = 0 AND usage.[3MonUsage] > 0) 
    OR (orders.OpenQty > 0 AND usage.[3MonUsage] = 0)

請讓我知道，如果有什麼不清楚。感謝您的幫助提前。 -Alex

來源

2017-02-21 alexb523

好，平凡，只是重複同樣的代碼：

SELECT Cust.Article, 
    IsNull(stock.StockQuantity,0) StockQuantity, 
    IsNull(orders.OpenQty,0) OpenOrders, 
    IsNull(usage.[3MonUsage], 0) [3MonUsage], IsNull(usage.EAU, 0) [EAU], 
    ROUND(IsNull(usage.EAU, 0)/366,0) DailyUsage, 
    CASE WHEN IsNull(usage.EAU, 0)/366 = 0 THEN ROUND(IsNull(stock.StockQuantity,0)/(IsNull(orders.OpenQty, 0)/366),2) 
    ELSE ROUND(IsNull(stock.StockQuantity,0)/(IsNull(usage.EAU, 0)/366),2) END AS DaysOfStock, 
    DateAdd(day, 
      CASE WHEN IsNull(usage.EAU, 0)/366 = 0 THEN 
       ROUND(IsNull(stock.StockQuantity,0)/(IsNull(orders.OpenQty, 0)/366),2) 
      ELSE 
       ROUND(IsNull(stock.StockQuantity,0)/(IsNull(usage.EAU, 0)/366),2) 
      END, 
      GetDate()) AS ProjectedDate 
FROM TeslaArts 
     LEFT OUTER JOIN usage ON CustArts.Article = usage.Article 
     LEFT OUTER JOIN stock ON CustArts.Article = stock.Article 
     LEFT OUTER JOIN orders ON CustArts.Article = orders.Article 
WHERE (orders.OpenQty > 0 AND usage.[3MonUsage] > 0) 
    OR (orders.OpenQty = 0 AND usage.[3MonUsage] > 0) 
    OR (orders.OpenQty > 0 AND usage.[3MonUsage] = 0)

來源

2017-02-21 19:49:54

SQL - 如果語句裏面有DateAdd

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