How to retrieve the value of last identity has been updated in a database?

Question

how to retrieve the value of last identity has been updated in a database

Answer 1

Hi,
Oracle 10g, FGA - Fine grained auditing, supports DML statements (9i only select).
Set up FGA using the DBMS_FGA.ADD_POLICY procudure:
sql> BEGIN
DBMS_FGA.ADD_POLICY (
policy_name => 'AUD_EMPLOYEE_SAL',
object_schema => 'HR',
object_name => 'EMPLOYEE',
audit_column => SALARY',
audit_condition => '',
statement_type => 'UPDATE');
END;
NEXT:
sql> SELECT dbuid, lsqltesxt FROM sys.fga_logs$;
The database inserts the audit record into the FGA_LOG$ table using an autonomous transaction; even if you roll back the update statement, the update action will still be logged in this table. The fga_log$ tracks the session, machine id, timestamp, schema, scn, etc:
SQL> desc fga_log$
Name Null? Type
SESSIONID NOT NULL NUMBER
TIMESTAMP# DATE
DBUID VARCHAR2(30)
OSUID VARCHAR2(255)
OSHST VARCHAR2(128)
CLIENTID VARCHAR2(64)
EXTID VARCHAR2(4000)
OBJ$SCHEMA VARCHAR2(30)
OBJ$NAME VARCHAR2(128)
POLICYNAME VARCHAR2(30)
SCN NUMBER
SQLTEXT VARCHAR2(4000)
LSQLTEXT CLOB
SQLBIND VARCHAR2(4000)
COMMENT$TEXT VARCHAR2(4000)
PLHOL LONG
STMT_TYPE NUMBER
NTIMESTAMP# TIMESTAMP(6)
PROXY$SID NUMBER
USER$GUID VARCHAR2(32)
INSTANCE# NUMBER
PROCESS# VARCHAR2(16)
XID RAW(8)
AUDITID VARCHAR2(64)
STATEMENT NUMBER
ENTRYID NUMBER
DBID NUMBER
LSQLBIND CLOB
SQL> spool off