Upgrade Oracle Apex (Oracle Application Express) From Version 4.x to 5.x
First download the Oracle Apex 5.x from the Oracle.com with the following link:
Then start the sqlplus and give the SYS credintials to logon as following:
SQL*Plus: Release 18.104.22.168.0 Production on Thu Aug 27 16:36:43 2015
Copyright (c) 1982, 2010, Oracle. All rights reserved.
SQL> connect SYS AS SYSDBA
After connected run the following script as given in the example below:
SQL> @apexins.sql SYSAUX SYSAUX TEMP /i/
SQL> @apex_epg_config.sql /software — this is the folder in which you extracted the zip file.
Up-gradation is complete and now you can run the Apex 5 successfully.