The difference between sys/ and sys@xe (Oracle) Can anyone tell me in detail,what is the difference between sqlplus sys/ as sysdba and sqlplus sys@xe as sysdba?For the records the database is installed on the same machine as the client.
sqlplus sys/ as sysdba connects directly to the database without using networking (TNS. This type of connection is called a bequeath connection.

sqlplus sys@xe as sysdba connects through the listener.