can anyone explain me the output of the 2 below listes Distinct keyword queries!

Question

Select Distinc f_name, l_name from customers;

And

Select Distinc f_name, Distinct l_name from customers;

Answer 1

The first will return all f_name and l_name from the customers table where the f_name must be different than the other f_name values returned.

The second will return the same, but both f_name and l_name must be different.

https://www.w3schools.com/sql/sql_distinct.asp