How to create a counter using Oracle SQL Developer?

Question

Is there any way to create a counter using Oracle SQL Developer to create the below scenario. Meaning it will recorded down the name of user and ID and time and the date they login.
Library portal home statistics shows how many users (outside and within the campus) visit the library portal.
Page Access statistics is recorded on an hourly basis. Users may select the statistics by
yearly (statistics displayed by all months in the selected year)
monthly (statistics displayed by all days in the selected month)
daily (statistics displayed by all hours in the selected day)

Answer 1

I'm giving here one basic post - hope this will solve your problem --
SQL>
SQL>
SQL> create table audit_info
  2   (
  3     usr        varchar2(50),
  4     log_time   timestamp(6)
  5    );
Table created.
SQL>
SQL>
SQL>  create table err_log
  2     (
  3       log_cd      varchar2(20),
  4       log_desc    varchar2(500)
  5     );
Table created.
SQL>
SQL>
SQL>   create or replace procedure ins_err(errcd   in  varchar2,
  2                                        errnm   in  varchar2)
  3    is
  4      pragma autonomous_transaction;
  5    begin
  6      insert into err_log values(errcd,errnm);
  7      commit;
  8    end;
  9  /
Procedure created.
SQL>
SQL>
SQL>   create or replace procedure ins_aud(ud   in varchar2,
  2                                        unm  in varchar2)
  3    is
  4      pragma autonomous_transaction;
  5    begin
  6      insert into audit_info values(ud,unm);
  7      commit;
  8    exception
  9      when others then
10        ins_err(sqlcode,sqlerrm);
11    end;
12  /
Procedure created.
SQL>
SQL>
SQL>
SQL> create or replace trigger log_odsuser1
  2   after logon on odsuser1.schema
  3   begin
  4     ins_aud('ODSUSER1',sysdate);
  5   exception
  6     when others then
  7       ins_err(sqlcode,sqlerrm);
  8   end;
  9  /
Trigger created.
SQL>
SQL*Plus: Release 9.2.0.1.0 - Production on Tue Jun 12 12:21:09 2007
Copyright (c) 1982, 2002, Oracle Corporation.  All rights reserved.
Connected to:
Oracle9i Enterprise Edition Release 9.2.0.6.0 - 64bit Production
With the Partitioning, OLAP and Oracle Data Mining options
JServer Release 9.2.0.6.0 - Production
SQL>
SQL>
SQL>
SQL> set serveroutput on
SQL>
SQL>
SQL> select * from audit_info;
USR
LOG_TIME
ODSUSER1
12-JUN-07 12.00.00.00000000 AMHope this will solve your purpose.
Regards.
Satyaki De.