Db sanity check

Question

Hi All,
I would like to develop sanity check script for our product Oracle Db.
It should be put on crontab, worked periodically.
How can I retrieve simple pl/sql query(for example how many connections and user..) elapsed time?. Is it possible to achieve this goal by using UNIX scripts(perl, bash etc..) and specific pl/sql statement or have I write to application with java or C?

Answer 1

Bash and Sql can be used for that, but you should clarify a bit more what you want to do. Here a small example :
$ cat users.sql
col username for a20
select sid, serial#, username, to_char(logon_time,'dd/mm/yyyy hh24:mi:ss') logon_time,
        to_number(sysdate - logon_time)*1440 elapsed_minutes
from v$session
where username is not null
order by username, logon_time
exit
$ sqlplus -s / as sysdba @users
       SID    SERIAL# USERNAME             LOGON_TIME          ELAPSED_MINUTES
       144         38 SCOTT                02/04/2006 15:18:10      21.6666667
       142         14 SCOTT                02/04/2006 15:28:41           11.15
       143        105 SYS                  02/04/2006 15:39:50               0
       159        113 TEST                 02/04/2006 15:18:43      21.1166667
$