right here my sql
SELECT tblemployee.employeeId, tblExposure.Dateexposure, [Valuef/cm]*[Durationofexposure] AS [Total Ex], tblExposure.[Low ex] AS Expr1
FROM tblExposure INNER JOIN tblemployee ON tblExposure.ID = tblemployee.ID
GROUP BY tblemployee.employeeId, tblExposure.Dateexposure...