Why can't we practice SQL in sololearn code playground???

Answer 1

I imagine its a storage/cost issue; if you were allowed to create your own database through this site Sololearn would have to store the information which is costly to them as it would be considerably bigger than a small bit of code. If they had a premade database that you were allowed to edit it would be open to both abuse and also to being deleted by anyone who isn't well versed enough in SQL.

Answer 2

I posted an answer to a similar question for those interested in alternative options.

https://www.sololearn.com/Discuss/1935035/?ref=app

Answer 3

It's hasn't been declared a weapon yet. Maybe later in the future, many other languages we also be made available for challenges.

Answer 4

Perhaps one day when there is more capacity in the clouds??