MySQL databases allow you to store lots of information in an easy to access manner. The databases themselves are not easily read by humans. MySQL databases are required by many web applications including popular content management systems (WordPress, Joomla!, Drupal), bulletin board applications and many more. To use a database, you will need to create it. Only MySQL Users (different than mail or other users) that have privileges to access a database can read from or write to that database.
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