I recently inherited a Drupal site and while trying to migrate the site and DB I noticed that the DB is 1GB+ and had 1000s of tables. This is the first time i work with Drupal so I'm not sure what these tables are.
A lot of them are exactly 128KB and named something like drupal_field_data_style_abc or drupal_field_revision_abc. Is it safe to delete these? Not really sure what they are for at the moment.