1- The installation requires

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

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

2- Download Oracle APEX

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).Sign in to user sys, as sysdba.Login successful:Run script apexins.sql?

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---- 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:

?

123	-- 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.

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

Port default is 8080:The configuration has been completed.

5- Running Oracle APEX admin

You have successfully logged into the system of management of Oracle APEX:

6- Getting Started with Oracle APEX programming

Next you can be ready with Oracle APEX programming, you can read document: