CONNECT / AS SYSDBA
 
DROP TABLE user_login_audit;
 
CREATE TABLE user_login_audit (
     login_time     DATE,
     username        VARCHAR2(30),
     machine          VARCHAR2(30),
        command          VARCHAR2(128)
);
 
CREATE OR REPLACE TRIGGER user_login_trig
     AFTER LOGON ON scott.SCHEMA
DECLARE
  v_username sys.v_$session.username%TYPE;
  v_machine  sys.v_$session.machine%TYPE;
  v_command  sys.v_$session.command%TYPE;
BEGIN
  SELECT username, machine, command 
    INTO v_username, v_machine, v_command
    FROM sys.v_$session 
   WHERE audsid = USERENV('SESSIONID')
     AND audsid != 0  -- Don't Check SYS Connections
     AND ROWNUM = 1;  -- Parallel processes will have the same AUDSID's
 
  INSERT INTO sys.user_login_audit 
     VALUES (SYSDATE, v_username, v_machine, v_command);
 
  IF UPPER(v_machine) LIKE '%PC1%' THEN          -- Start SQL trace for users from PC1
     DBMS_SESSION.set_sql_trace(TRUE);
  END IF;
END;
/
SHOW ERRORS
 
CONNECT SCOTT/TIGER
 
CONNECT / AS SYSDBA
 
SELECT * FROM sys.user_login_audit;