Question

i have the following code. my problem is i want to retrieve each employee name from another table name Employee which has a EmployeeID column similar to the AccessLog table, I used in this current query. now when i m joining these 2 table it is giving that weird error i said on the title. without the added code for joining- A.EmployeeID, Employee.FirstName in the first SELECT and ; AS A INNER JOIN Employee ON A.EmployeeID= Employee.EmployeeID to the last ORDER By clause, it is working good. I think problem is in the naming/alias. there are similar thread i saw, but those did not solve my problem. If someone could point me the fault, will appreciate.

SELECT **A.EmployeeID,
    Employee.FirstName,**
    MonthName(Month([LogDate])) AS MonthName,
    Round((Sum(Int(DateDiff("s",'00:00:00',Duration)))/3600)) AS TotalTime
    FROM (
         SELECT AccessLog.EmployeeID, 
                AccessLog.LogDate, 
                AccessLog.TerminalID, 
                AccessLog.LogTime, 
                Format((SELECT max(LogTime) 
                        FROM AccessLog AS Alias 
                        WHERE Alias.LogTime < AccessLog.LogTime 
                        AND Alias.EmployeeID = AccessLog.EmployeeID 
                        AND Alias.LogDate = AccessLog.LogDate 
                        AND (Alias.TerminalID)<>"iGuard1A" 
                        And (Alias.TerminalID)<>"iGuard1B"  
                        AND Alias.EmployeeID = AccessLog.EmployeeID),"hh:nn:ss") AS PrevTime, 
                Format((ElapsedTime(iif(PrevTime = '',logtime,prevtime),[LogTime])),"hh:nn:ss") AS Duration, 
                AccessLog.InOut 
             FROM AccessLog 
             WHERE (((AccessLog.TerminalID)<>"iGuard1A" 
             And (AccessLog.TerminalID)<>"iGuard1B") 
             AND ((AccessLog.EmployeeID) Like "2*") 
             AND ((AccessLog.InOut)="OUT")) 
             ORDER BY AccessLog.EmployeeID, AccessLog.LogDate, AccessLog.LogTime)  
             **AS A INNER JOIN Employee ON A.EmployeeID= Employee.EmployeeID**
      GROUP BY EmployeeID, MonthName(Month([LogDate]));

Answer 1

i solved it. As i said there is name/alias issue. I had to give seperate alias to the same table used in every subquery. even after that it show another error of aggragate function for the firstname in the top select, i also solved that by including it in a subquery. so in full my code goes as follows:

SELECT C.EmployeeID, 
   (SELECT Employee.FirstName& ' ' &Employee.LastName 
      FROM Employee 
      where C.EmployeeID= Employee.EmployeeID) 
    AS FullName, 
   MonthName(Month([LogDate])) AS MonthName,
   Round((Sum(Int(DateDiff("s",'00:00:00',Duration)))/3600)) AS TotalTime
   FROM (SELECT B.EmployeeID, 
              B.LogDate, 
              B.TerminalID, 
              B.LogTime, 
              Format((SELECT max(LogTime) 
                      FROM AccessLog AS A 
                      WHERE A.LogTime < B.LogTime 
                      AND A.EmployeeID = B.EmployeeID  
                      AND A.LogDate = B.LogDate 
                      AND (A.TerminalID)<>"iGuard1A" 
                      And (A.TerminalID)<>"iGuard1B"  
                      AND A.EmployeeID = B.EmployeeID),"hh:nn:ss") AS PrevTime,  
              Format((ElapsedTime(iif(PrevTime = '',logtime,prevtime),[LogTime])),"hh:nn:ss") AS Duration, 
              B.InOut 
              FROM AccessLog As B  
              WHERE (((B.TerminalID)<>"iGuard1A" 
               And (B.TerminalID)<>"iGuard1B") 
               AND ((B.EmployeeID) Like "2*") 
               AND ((B.InOut)="OUT")) 
               ORDER BY B.EmployeeID, B.LogDate, B.LogTime)  
AS C INNER JOIN Employee ON C.EmployeeID= Employee.EmployeeID
GROUP BY C.EmployeeID, MonthName(Month([LogDate]));