Scripts to manage users

Question

Hi friends, I hope that can help me with three questions:<br>
<ul>
<li>How do I know wich privileges have a user/role?</li>
<li>How do I limit resources for some user/role?</li>
<li>How do I know the "query" or command used by some User in the database (but the user can be an application)?</li>
</ul>
Thanks.

Answer 1

3. Using FGAC??
SELECT
           S.SID
          ,S.SERIAL#
          ,S.AUDSID
          ,S.STATUS
          ,S.USERNAME
          ,S.OSUSER
          ,DECODE(S.COMMAND, 0, 'No command'
               ,2, 'INSERT'
               ,3, 'SELECT'
               ,6, 'UPDATE'
               ,7, 'DELETE'
               ,26, 'LOCK TABLE'
               ,27, 'NO OPERATION'
               , 'OTHER') COMMAND
          ,T.SQL_TEXT
     FROM
           V$SESSION S
          ,V$SQL T
     WHERE T.ADDRESS = S.SQL_ADDRESS
     ORDER BY S.STATUS DESC, S.SID
     ;