Count ID only on max(data)

[lg92]

Hi,

I need to count IDs only if max(data).

For example:

IDs    Data

1      29/11/2020

2      29/11/2020

3     29/11/2020

4     30/11/2020

5     30/11/2020

The result of counter is 2 because 30/11 > 29/11 and there are two ID's (4,5)

Thank you in advance.

[Nicole-Smith · Accepted solution]

This should work:
count({<Data = {'$(=maxstring(Data))'}>} IDs)