hook_schema() Drupal 7?

   * Define the current version of the database schema.
   * A Drupal schema definition is an array structure representing one or more tables and their related keys and indexes. A schema is defined by hook_schema() which must live in your module's .install file.
   * The tables declared by this hook will be automatically created when the module is first enabled, and removed when the module is uninstalled. This happens before hook_install() is invoked, and after hook_uninstall() is invoked, respectively.