Why SQL in solo learn is without a 'code playground' feature ?

Answer 1

SQL is created to send queries to a database. You cannot create database because you would need a server that it could be placed on. Hence no SQL on playground, unless they make feature with virtual databases, but it is too much work for not really needed feature.

Answer 2

It’s a lot of work, yes. But it’s a needed feature.

For those wanting to try SQL commands, I recommend W3Schools