postgres is being accessed by other users code example

Example: pgadmin postgres ERROR: database is being accessed by other users

PostgresVersion >=9.2

SELECT 
   pg_terminate_backend(pg_stat_activity.pid)
FROM pg_stat_activity
WHERE
   pg_stat_activity.datname = 'name_of_database_to_be_disconnected'
AND pid <> pg_backend_pid()