Hello everybody,

I have a data that is like this:

Date Room Time In
1 1 7:30 am
1 1 10:30 am
1 2 8:30 am
1 2 1:10 pm
2 1 8:30 am
2 1 6:40 am
2 1 9:45 pm
etc

can i have the minimum of every date AND room?, i.e. have a set of
minimums for each room and each room?
I am interested in knowing the starting times throughouth a month for
all rooms.

regards