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I would like to analyze the audit trail to get information about database activity. How do I view audit information?<p><B>Technique</B><p>Look in the AUD$ table, known as the audit trail, which contains all auditing information, or look at the files in the AUDIT_FILE_DEST directory. When your Oracle8 database is created, the CATAUDIT.SQL script, located in the $ORACLE_HOME/rdbms/admin directory, is run through the CATALOG.SQL script. These scripts create several data dictionary views that make analyzing the AUD$ table easier, such as DBA_AUDIT_TRAIL (all audits), DBA_AUDIT_SESSION (session audits), and DBA_AUDIT_OBJECT (object and statement audits). By querying DBA_OBJ_AUDIT_OPTS, you can determine the audit options for all objects. By querying DBA_PRIV_AUDIT_OPTS, you can determine the audit options for sessions and privileges.<p><B>Steps</B><p><B>1.</B>	Connect to SQL*Plus as the WAITE account. If you have not already created the SENSITIVE_DATA table and AUDIT commands from How-To 8.8, do so now.<p><B>2.</B>	Ensure that auditing is working. The SYS.AUD$ table contains every audit entry. Because nothing has been done to create an audit entry, there should be nothing in the table. Do a count on the table to be sure:<code><b><p>SQL> SELECT COUNT(*) FROM SYS.AUD$;<p>COUNT(*)<p>--------<p>0<p>SQL><p></b></code>Generate the first audit record by connecting to SQL*Plus again as the WAITE user. Step 4 from How-To 8.8 enabled auditing for each time someone connects as the WAITE user account. Again, do a count on the SYS.AUD$ table:<p><code><b>SQL> SELECT COUNT(*) FROM SYS.AUD$;<p>COUNT(*)<p>--------<p>1<p>SQL></b></code><p><B>3.</B>	Create an additional audit record by running CHP8_32.SQL as shown in <A HREF="image/08oht34.gif" TARGET="_blank">Figure 8.34</A>. This script will SELECT from the SENSITIVE_DATA table, adding an audit trail entry as a result from the previous How-To.<p><B>4.</B>	At this point, two records are in the audit trail. To see the records, you can select from the DBA_AUDIT_SESSION view for session audits, and the DBA_AUDIT_OBJECT view for object audits. Load CHP8_33.SQL into the SQL buffer, and run it.<p><code><b>SQL> START CHP8_33.sql<p>1 SELECT USERNAME, TERMINAL, ACTION_NAME,<p>2 TO_CHAR (LOGOFF_TIME, 慏D-MON-YYYY HH:MI:SS
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