Naming the database but not the user

Specify only dbname to set the default dbuser as “sybmail” and to cause Adaptive Server to execute any query under the user context of “guest”.

When the specified database is a system database, a “guest” account always exists. However, when the specified database is a user database, the database owner must have ensured that there is a “guest” user in the database that can map to any login and execute queries with minimal permissions.