Creating Use AND PROVIDING PREVILEGES:
SQL>connect system/<passward>
SQL>CREATE USER <user name> IDENTIFIED BY <USER_passward>;
SQL>ALTER USER <user name> ACCOUNT UNLOCK;
SQL>GRANT CONNECT TO <user name>;
SQL>GRANT RESOURCE TO <user name>;
SQL>GRANT CREATE VIEW TO <user name>;
SQL>GRANT CREATE TRIGGER TO <user name>;
OR
SQL>GRANT DBA TO <user name>;
SQL>connect system/<passward>
SQL>CREATE USER <user name> IDENTIFIED BY <USER_passward>;
SQL>ALTER USER <user name> ACCOUNT UNLOCK;
SQL>GRANT CONNECT TO <user name>;
SQL>GRANT RESOURCE TO <user name>;
SQL>GRANT CREATE VIEW TO <user name>;
SQL>GRANT CREATE TRIGGER TO <user name>;
OR
SQL>GRANT DBA TO <user name>;