Description
DROP DATABASE drops a database. It removes the
catalog entries for the database and deletes the directory
containing the data. It can only be executed by the database owner.
Also, it cannot be executed while you or anyone else is connected
to the target database. (Connect to template1 or any
other database to issue this command.)
DROP DATABASE cannot be undone. Use it with care!
Notes
DROP DATABASE cannot be executed inside a transaction
block.
This command cannot be executed while connected to the target
database.