I want to find the earliest date among a set of dates for an activity. Thanks for your time.
For example
Activity ActivityDate
A10 2016-08-01
A10 2016-06-21
A11 2016-06-02
A11 2016-01-09
A11 2016-09-09
The expected result is:
Activity ActivityDate
A10 2016-06-21
A11 2016-01-09