18 . How database system of drupal works ?

Drupal stores information in a database; each type of information has its own database table. For instance, the basic information about the nodes of your site are stored in the Node table, and if you use the CCK module to add fields to your nodes, the field information is stored in separate tables. Comments and Users also have their own database tables, and roles, permissions, and other settings are also stored in database tables.