compare Time between 2 table

[gracehskuo]

leinad31;
hi,please help.when i run the query have error appear.

this is my current code:

strsql = "UPDATE OverTime " & _
            "Set OverTime.match=1 " & _
            "FROM OverTime INNER JOIN Attendance " & _
            "ON OverTime.overtimedate = Attendance.overtimedate " & _
            "And OverTime.employeeno = Attendance.employeeno " & _
           "And datediff('n',Overtime.TimeFrom,Attendance.Time)=0"