The sample databases contain a guest user that allows access to the database by any authorized Adaptive Server user. The guest user has a wide range of privileges, including permissions to select, insert, update, and delete user tables. For more information about the guest user and a list of guest permissions, see the System Administration Guide.
Sybase recommends that you remove the guest user from user databases in production systems.
If possible, and if space allows, give each new user a clean copy of the sample databases so that she or he is not confused by other users’ changes.
If space is a problem, you can instruct the user to issue the begin transaction command before updating a sample database. After the user has finished updating one of the sample databases, he or she can issue the rollback transaction command to undo the changes.