Structure of dba_users

Name                                                          Null?                Type
 -----------------------------------------                           --------           ----------------------------
 USERNAME                                              NOT NULL     VARCHAR2(30)
 USER_ID                                                   NOT NULL       NUMBER
 PASSWORD                                                                        VARCHAR2(30)
 ACCOUNT_STATUS                                NOT NULL       VARCHAR2(32)
 LOCK_DATE                                                                       DATE
 EXPIRY_DATE                                                                    DATE
 DEFAULT_TABLESPACE                        NOT NULL       VARCHAR2(30)
 TEMPORARY_TABLESPACE                 NOT NULL        VARCHAR2(30)
 CREATED                                                  NOT NULL          DATE
 PROFILE                                                   NOT NULL         VARCHAR2(30)
 INITIAL_RSRC_CONSUMER_GROUP                              VARCHAR2(30)
 EXTERNAL_NAME                                                              VARCHAR2(4000)