SQL practice

Question

SQL

Greetings!

Throw, please, something on which you can remember and practice a bit of SQL.

You need to refresh your old skills in order to feel free (yes, an interview :))

Answer 1

SQL exercises

Answer 2

Indeed, it is difficult to recommend something better than sql-ex.ru. Here, however, I googled a little more:
Exercises in SQL
SQL. Challenges and Solutions