Online tests for knowledge of SQL queries?

Question

PHP

Are there any good tests for knowledge of simple and complex queries (without/with subqueries)?
For example, the task to display all employees. You write in the input field Select name from employees;and it displays and shows these same names. That is, not a stupid test where you click on checkboxes, but also with the data output itself.

Answer 1

sql-ex.ru
sql-ex.ru/learn_exercises.php and start with this.

Answer 2

another option:
https://proghub.ru/tests/sql

Answer 3

https://www.codecademy.com/courses/learn-sql

Answer 4

It's easier to install some kind of sqlite for yourself, upload a dump of something there. And to be perverted by jerking and clogging information.
if by subject then www.w3schools.com/sql

Answer 5

sqlbolt.com - there is a theory and you can immediately practice in practice and complete tasks.

Answer 6

See rgrty.ru/sqltest

Answer 7

https://tests4geeks.com/sql-online-test
very interesting questions, albeit with "checkboxes"