Which MySQL command enables a user to delete tables or databases?

The MySQL command that allows a user to delete tables or databases is the DROP command. Here's how you can use it:

1. To delete a database: Syntax: DROP DATABASE database_name; Example: DROP DATABASE my_database; This command will delete the database named 'my_database' and all the tables within it.

2. To delete a table: Syntax: DROP TABLE table_name; Example: DROP TABLE my_table; This command will delete the table named 'my_table' from the current database.

Please note that you need to be very careful while using the DROP command because once the database or table is deleted, all the information available in the database or table will be lost permanently.