How to re-activate the Drupal administrator account that got accidently blocked? The admin user account of my Drupal site accidently got deactivated. Because of that, I have no more access to Drupal administration.

How can I change the status of that user account to active again?
Open the users table and in the admin row, check the status column. 0 means blocked and 1 means active. Make sure it is set to 1.