Ratheesh.K.Nair (3/12/2009)
First you connect to that particular database using login 'system'ie conn system\password@DB_Name as sysdba. Then try
BA
SYS and SYSTEM are Oracle equivalents of "sa" account; you don't want to connect to the database using such powerfull accounts just to create an user.
Ask your Oracle DBA to grant you the privileges or, if you are the DBA just use your DBA account -the one who belongs to the DBA ROLE.
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Pablo (Paul) Berzukov
Author of Understanding Database Administration available at Amazon and other bookstores.
Disclaimer: Advice is provided to the best of my knowledge but no implicit or explicit warranties are provided. Since the advisor explicitly encourages testing any and all suggestions on a test non-production environment advisor should not held liable or responsible for any actions taken based on the given advice.