how to force delete a database in psql server code example

Example 1: postgres delete database

CREATE DATABASE testdb1;
DROP DATABASE testdb1;

Example 2: how to hard drop database in postgres

It means another user is accessing the database. Simply restart PostgreSQL. This command will do the trick

root@kalilinux:~#sudo service postgresql restart
Then try dropping the database:

postgres=# drop database test_database;
This will do the trick.