CREATE USER username
    IDENTIFIED BY password
    [DEFAULT TABLESPACE tablespace]
    [QUOTA {size | UNLIMITED} ON tablespace]
    [PROFILE profile]
    [PASSWORD EXPIRE]
    [ACCOUNT {LOCK | UNLOCK}];

CREATE INDEX index_name
    ON table_name(column1[,column2,...]);

GRANT {system_privileges | object_privileges }
    TO user
    [WITH ADMIN OPTION];

REVOKE {system_privilege | object_privilege } FROM user;

CREATE TABLESPACE tbs1
   DATAFILE 'tbs1.dbf'
   SIZE 1m
   AUTOEXTEND 20m;
CREATE TABLE table_name(
   ...
) TABLESPACE tablespace_name;