switch user ("su" like) Créer un script "su.sql" : whenever sqlerror exit column password new_value pw -- test access to dba_users and if the user exists declare  l_passwd varchar2(45); begin  select password into l_passwd     from sys.dba_users     where username = upper('&1'); end; / -- select password in variable pw select password  from sys.dba_users  where username = upper( '&1' ); / -- change the password for "Hello" alter user &1 identified by Hello; connect &1/hello -- once connected, change password back alter user &1 identified by values '&pw'; show user whenever sqlerror continue