MySQL is a popular database system that allows you to create internal tables and fields to store data.
What is a database and what's it for? Basically, a database is used to quickly store or retrieve any sort of data. For example, most message boards use MySQL databases to store and retrieve all usernames, passwords, profiles, messages, etc. Without a database, it would have to create thousands of individual text files which could get messy.
Drop A Database
mysqladmin -u USERNAME -p drop DATABASE
Create A Database
mysqladmin -u USERNAME -p create DATABASE
Import Backup Data
mysql -u USERNAME -p DATABASE < FILENAME.sql
mysqldump -u USERNAME -p DATABASE > FILENAME.sql