爲什麼我會爲此查詢獲取「缺少關鍵字」？

Question

Select A.Smscid, 
     A.Delivery_Date, 
     A.Type, 
     A.End_Delivery, 
     A.Volume, 
     (Case When A.Type='Transactional' And A.End_Delivery=B.Operator 
      Then (A.Volume*B.Onnet_Trans_Cost)) As "COST", 
From Telco_Success a,operators_cost b; 

我越來越缺少關鍵字的錯誤：

Answer 1

未經檢驗的，但你似乎缺少您Case聲明End關鍵字。你也似乎有一個逗號後，「COST」是不需要的。

Select A.Smscid, 
     A.Delivery_Date, 
     A.Type, 
     A.End_Delivery, 
     A.Volume, 
     (Case When A.Type='Transactional' And A.End_Delivery=B.Operator 
      Then (A.Volume*B.Onnet_Trans_Cost) End) As "COST" 
From Telco_Success a,operators_cost b;