How to delete a db

Technical Help
#1

I created a few DBs for my tests, and now I need to clean them up.
any suggested command to do it safely?

I did
quantrocket db -h
but cannot see any argument to "delete/drop".

#2

For history dbs:

quantrocket history drop-db mydb --confirm-by-typing-db-code-again mydb
#3

it works thanks Brian