How to Check Which User is Connected to Current Oracle Session? 3 different methods

There are three different simple ways to identify the current user session in oracle sqlplus.

1.     Using DBMS_UTILITY. OLD_CURRENT_USER function.

select DBMS_UTILITY.OLD_CURRENT_USER from dual;

SQL> /

OLD_CURRENT_USER

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STHOMAS

2.     SQL*Plus command – Show user

SQL> show user

USER is "STHOMAS"

3.     Using SYS_CONTEXT function

SQL> select SYS_CONTEXT ('USERENV', 'CURRENT_USER') from dual;

SYS_CONTEXT('USERENV','CURRENT_USER')

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STHOMAS