Ram,
Here is another query with more details.
SELECT
SI_ID, SI_NAME, SI_USERFULLNAME, SI_DESCRIPTION, SI_LASTLOGONTIME, SI_KIND, SI_EMAIL_ADDRESS, SI_CREATION_TIME, SI_UPDATE_TS, SI_NAMEDUSER, SI_PASSWORDEXPIRE, SI_FORCE_PASSWORD_CHANGE from CI_APPOBJECTS, CI_SYSTEMOBJECTS, CI_INFOOBJECTS where (SI_KIND = 'User')
Regards,
Ajay