D Web portal contains a list of the MySQL, Oracle and PostgreSQL database error codes. The code can be found with its description in many localizations and compared its existence through different versions of the database.
Database error codes
O2 Archive is the service for secured data storage with guaranteed persistence time called retention class similar to open source solutions such as OwnCloud or Dropbox. It is used to store important documents of companies (law firms, schools, medical facilities, …) that have to be backed up for some time.