This option operates
differently in each DBMS.
Oracle: A
link is a database object that identifies an object that is stored
in a remote database. A link contains stored path information and
can also contain user name and password information for connecting
to the remote database. If you specify a link, SAS uses the link to
access remote objects. If you omit DBLINK=, SAS accesses objects in
the local database.
Sybase: You
can use this option to link to another database within the same server
to which you are connected. If you omit DBLINK=, SAS can access objects
only in your default database.