>>>SCRIPTS :

User access to database within limits of time

Here's a logon script and showed how it’s working:

C:\Documents and Settings\Administrator>sqlplus "/as sysdba"

SQL*Plus: Release 10.2.0.1.0 - Production on Tue Jul 28 14:56:58 2009

Copyright (c) 1982, 2005, Oracle.  All rights reserved.


Connected to:
Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - Production
With the Partitioning, OLAP and Data Mining options

SQL> create user orcl identified by orcl;

User created.

SQL> grant connect, resource to orcl;

Grant succeeded.

SQL> conn orcl/orcl
Connected.
SQL> disc
Disconnected from Oracle Database 10g Enterprise Edition Release 10.2.0.1.0 - Pr
oduction
With the Partitioning, OLAP and Data Mining options
SQL> conn / as sysdba
Connected.
SQL> CREATE OR REPLACE TRIGGER limit_connection
  2     AFTER LOGON ON DATABASE
  3  BEGIN
  4     IF USER = 'orcl' THEN
  5        IF to_number(TO_CHAR (SYSDATE, 'hh24')) BETWEEN 8 AND 22
  6        THEN
  7           RAISE_APPLICATION_ERROR(-20998,' Dear user '||USER||'! You can''t login between 08 and 22');
  8        END IF;
  9     END IF;
10  END limit_connection;
11  /

Trigger created.

SQL> select to_char(sysdate,'hh24') from dual;

TO
--
23

SQL> conn orcl/orcl
Connected.
SQL> select to_char(sysdate,'hh24') from dual;

TO
--
18

SQL> conn orcl/orcl
ERROR:
ORA-00604: error occurred at recursive SQL level 1
ORA-20998:  Dear user orcl! You can't login between 08 and 22
ORA-06512: at line 5


Warning: You are no longer connected to ORACLE.
SQL>


Cheers!