Create Date Range from Dates Entered

Need help
1

Im doing a sleep diary where the user enters sleep data for generally a 2 week period at a time. What I want to do is make a list that shows when the user has created entries.

I think I know how to do this where it will show each date with entries but I would like to show the start an end date only of each date range with entries. Is there a way to do that?

2

Select the :min and :max dates from the range

3

Im a bit confused with working with ranges. If I dont know the start and end date of the range how do I select the range. I mean, in the DB will be say there is data on the 28/7, 29/7, 30/7 and so on. But the expression has to be dynamic as the dates might be 1/5 etc.