DBA_AUDIT_SESSION displays all audit trail records concerning CONNECT and DISCONNECT.
USER_AUDIT_SESSION displays the audit trail records concerning connections and disconnections of the current user.
| Column | Datatype | NULL | Description | 
|---|---|---|---|
| OS_USERNAME | VARCHAR2(255) | Operating system login username of the user whose actions were audited | |
| USERNAME | VARCHAR2(30) | Name (not ID number) of the user whose actions were audited | |
| USERHOST | VARCHAR2(128) | Client host machine name | |
| TERMINAL | VARCHAR2(255) | Identifier of the user's terminal | |
| TIMESTAMP | DATE | Date and time of the creation of the audit trail entry (date and time of user login for entries created by AUDIT SESSION) in the local database session time zone | |
| ACTION_NAME | VARCHAR2(28) | Name of the action type corresponding to the numeric code in the ACTIONcolumn inDBA_AUDIT_TRAIL | |
| LOGOFF_TIME | DATE | Date and time of user log off | |
| LOGOFF_LREAD | NUMBER | Logical reads for the session | |
| LOGOFF_PREAD | NUMBER | Physical reads for the session | |
| LOGOFF_LWRITE | NUMBER | Logical writes for the session | |
| LOGOFF_DLOCK | VARCHAR2(40) | Deadlocks detected during the session | |
| SESSIONID | NUMBER | NOT NULL | Numeric ID for each Oracle session | 
| RETURNCODE | NUMBER | NOT NULL | Oracle error code generated by the action. Some useful values: 
 | 
| CLIENT_ID | VARCHAR2(64) | Client identifier in each Oracle session | |
| SESSION_CPU | NUMBER | Amount of CPU time used by each Oracle session | |
| EXTENDED_TIMESTAMP | TIMESTAMP(6) WITH TIME ZONE | Timestamp of the creation of the audit trail entry (timestamp of user login for entries created by AUDIT SESSION) in UTC (Coordinated Universal Time) time zone | |
| PROXY_SESSIONID | NUMBER | Proxy session serial number, if an enterprise user has logged in through the proxy mechanism | |
| GLOBAL_UID | VARCHAR2(32) | Global user identifier for the user, if the user has logged in as an enterprise user | |
| INSTANCE_NUMBER | NUMBER | Instance number as specified by the INSTANCE_NUMBERinitialization parameter | |
| OS_PROCESS | VARCHAR2(16) | Operating System process identifier of the Oracle process |