SQL> conn sys@orcl as sysdba
Enter password:
Connected.
SQL> create user boo identified by boo;

User created.

SQL> alter user boo default tablespace USERS quota 2m on users;

User altered.

SQL> GRANT CREATE SESSION TO boo;

Grant succeeded.

SQL> grant resource to boo;

Grant succeeded.

SQL> conn boo@orcl
Enter password:
Connected.
SQL> create table boo ( name varchar2(20));

Table created.

SQL> insert into boo values ('booo');

1 row created.

SQL> update boo set name = 'BOO';

1 row updated.

SQL> delete from boo;

1 row deleted.