function that returns a min date from table

[FreelanceReinh]

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@Quentin wrote:
If I can discover one new (to me) approach like that a year, my time on communities will be worth it. : )

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Thanks. Same here. :-) I think I learned that approach in 2018 from this post by John King.

[Quentin]

@Nasser_DRMCP , I suggest you un-accept my answer as the solution, and then select @FreelanceReinh 's custom interval answer as the solution.  My answer was just to celebrate the cool solution.  I didn't feel like a simple "like" was enough.  : )

[Nasser_DRMCP]

Quentin,

I agree with you to accept the FreelanceReinh 's solution; but I don't know how t un-accept yours

[Quentin]

I think if you click a button near my solution, there should be an option to select "this is not the solution" or something like that.  Or if you can't do it, it's possible one of the admins or super-users will do it. They have special powers. : )

[Nasser_DRMCP]

it s done !

thank for your help