Find MIN/MAX date in a range if it matches criteria of other columns

Question

Column A is date

Column B is criteria

I want to find the MIN date for each criteria. I tried using Ctrl

Answer 1

An even more compact array formula is:

=MINIF(B2=B:B,A:A)

NOTE 1: Complete using Ctrl+Shift+Enter to enter the formula as an array formula.

NOTE 2: The two-formula method (i.e., using =MIN(IF(B2=B:B,A:A))) is more flexible and works in more cases than the single-formula method shown here but I've included it as an answer as a possible option.