Get two database users and show their roles.
SQL> REM
SQL> accept user_1 prompt 'Enter the first user: '
Enter the first user: accept user_2 prompt 'Enter the second: '
SQL> select grantee, granted_role from dba_role_privs where
2 grantee in (upper('&user_1'),upper('&user_2'))
3 order by granted_role, grantee
4 /
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