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;
我收到缺少关键字错误: