The first query:
SELECT StationDaylyPeaksT.CTI_MTRID, StationDaylyPeaksT.Year, StationDaylyPeaksT.Week, Max(StationDaylyPeaksT.KW) AS KW
FROM StationDaylyPeaksT
GROUP BY StationDaylyPeaksT.CTI_MTRID, StationDaylyPeaksT.Year, StationDaylyPeaksT.Week;
Then, the second:
SELECT MV90SubKeys.CM_NAME...