查詢不會返回正確的值

Question

我有一個查詢下面給出：

SELECT DISTINCT(FldStrategyID), FldTradeServerName,FldBaseDir,FldBinaryStartTime 
FROM TblOrders Ord, 
    (SELECT CONCAT(FldStrategyID,'.',FldTradeServerName,'.',FldBaseDir,'.',FldBinaryStartTime) strid 
    FROM TblOrders 
    GROUP BY FldStrategyID) as OrderView 
WHERE Ord.FldStrategyID !='' 
    AND OrderView.strid NOT IN (SELECT FldStrategyID FROM TblStrategyMasters WHERE 1) 

的問題是，這部分是不工作：

OrderView.strid NOT IN (SELECT FldStrategyID FROM TblStrategyMasters WHERE 1) 

Answer 1

我認爲引號（'）在某處失蹤。