Скачать или смотреть Create database on Oracle Databse 11g application express and add connection to SQL Developer

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[ORACLE DATABASE EXPRESS 11X64]
https://www.oracle.com/technetwork/da...

[ORACLE SQL DEVELOPER]
https://www.oracle.com/technetwork/de...

[HOW TO INSTALL ORACLE DATABASE EXPRESS 11X64]
   • How To Install oracle database express edi...  
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use this command below to drop all useless table:

drop table APEX$_ACL;
drop table APEX$_WS_FILES;
drop table APEX$_WS_HISTORY;
drop table APEX$_WS_LINKS;
drop table APEX$_WS_NOTES;
drop table APEX$_WS_ROWS;
drop table APEX$_WS_TAGS;
drop table APEX$_WS_WEBPG_SECTION_HISTORY;
drop table APEX$_WS_WEBPG_SECTIONS;
drop table DEMO_CUSTOMERS;
drop table DEMO_ORDER_ITEMS;
drop table DEMO_ORDERS;
drop table DEMO_PRODUCT_INFO;
drop table DEMO_STATES;
drop table DEMO_USERS;
drop table DEPT;
drop table EMP;