Max Value of a set of records

[m17347047711116]

I have a query, that displays
Date,Time, Station 1 Value, Station2 Value, Station3 Value, Station4 Value

I would like to add to that query an expression that identifies which station had the highest value for that record.

 

[Rich]

It looks as though you have a design problem, you only need one field for station and another which identifies the station.
Do some searches here for normalize