How to remove duplicate elements in an array when unloading data from a table?

Question

SQL

There is a table in which there is a column with ID users which repeat on some lines. How to remove duplicate elements when displaying this data?

Answer 1

https://dev.mysql.com/doc/refman/8.0/en/distinct-o...

Answer 2

the simplest and the first thing that came to mind is to shove the driven IDs into the 2nd array and compare with the original array (table data array), and if there are duplicates, delete them.
or is it