1- The installation requires

Before installing Oracle Application Express (Oracle APEX) you need to:

Install Oracle Database (10g, 11g or 12c)

2- Download Oracle APEX

http://www.oracle.com/technetwork/developer-tools/apex/downloads/index.html

To download, you need to log in with an account of Oracle, if not, you can register a free account.

3- Installing Oracle APEX

Decompress zip file you have downloaded in some position of hard disk drive. Here I decompress it at C:/DevPrograms.

Note: Your folder must be named apex. This is compulsory.

Open CMD and CD to apex directory:

Next, enter sqlplus statement in order to log in sqlplus (Note: Don't open sqlplus directly. It should be through CMD after CD to apexdirectory).

Run script apexins.sql

--
-- Run script apexins.sql with parameters:
--
-- @apexins.sql tablespace_apex tablespace_files tablespace_temp images
--
-- Where:
-- tablespace_apex is the name of the tablespace for the Oracle Application Express application user.
-- tablespace_files is the name of the tablespace for the Oracle Application Express files user.
-- tablespace_temp is the name of the temporary tablespace or tablespace group.
-- images is the virtual directory for Oracle Application Express images.
-- (To support future Oracle Application Express upgrades, define the virtual image directory as /i/.)
--
 
@apexins.sql sysaux sysaux temp /i/

Wait for about 30 minutes until the above statement is completed.

The above script create some SCHEMA on Database, you can test by querying view ALL_USERS on SQLPlus:

4- Configuring APEX

You need log in SQLPlus again from CMD and sign in sys user as sysdba.

apex_egp_config.sql

This script will load the Application Express images into XDB and then configure a DAD for use by Application Express in the Embedded PL/SQL Gateway.

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--
-- Running script apex_epg_config.sql with parameter:
-- @apex_epg_config.sql <parent of apex directory>
--
 
@apex_epg_config.sql C:\DevPrograms

Unlock user anonymous:

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-- Unlock user anonymous:
 
alter user anonymous account unlock;

apexconf.sql

Run script apexconf.sql

Used to perform the final configuration steps for Oracle Application Express, including setting the XDB HTTP listener port and Application Express ADMIN password.

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--
-- Running script: @apxconf.sql
-- Setup password for ADMIN
-- Configuring XDB Http Listener port
--
 
@apxconf.sql

To user, you can use ADMIN by default, and email can be skipped.

To password, the system requires you to enter a strong password:

Password does not conform to this site's password complexity rules.

Password must contain at least 6 characters.
Password must contain at least one alphabetic character (abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ).
Password must contain at least one punctuation character (!"#$%&()``*+,-/:;?_).
Password must contain at least one upper-case alphabetic character.
Password must contain at least one lower-case alphabetic character.