...DISTINCTROW Format$([tblCaseData].[Date],"m/yy") AS DateByMonth, [tblCaseData]![Code] AS Activity, tblCaseData.EmployeeNumber, Count(*) AS Count,
Sum([tblCaseData]![OPAmt]) AS OPAmt,
Sum([tblCaseData]![OIAmt]) AS OIAmt,
GROUP BY Format$([tblCaseData].[Date],"m/yy")...