Having trouble with SAS Proc SQL grouping by date

[Ryujin]

I seem to be having trouble using the group by with Proc SQL e.g
in SQL if i wanted to take a datetime and group by day rather then the full datetime I would do:

CONVERT(varchar(10), DateTime, 101)

When I format to DateTime9.0 in SAS and then try to group by that same column it shows it as DateTime9.0 but won't group by the same.

[Flip]

If I understand you correctly take the date from the datetime by
datevar = datepart(datetimevar)
and group by that.

[Ryujin]

Thank you.
I just had the datepart in Select Statement and then referenced the alias in the group by