Oracle application express APEX - oracle

I was trying ot build a web application using Oracle application expressOnce. I logged out from APEX and logged in again leter. I couldn't located my incomplete application. How can I find my application so I can continue work on it?

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Sql Script file (apex_epg_config.sql) is missing in Oracle Apex 20.2

I have Oracle Apex 20.1 Installed on Oracle Linux 6.10 Server with Oracle Database 12.2. Recently I am trying to update into Apex 20.2 but this script file (apex_epg_config.sql) is missing in zip folder.
When I load the site then giving me this error:
There is a problem with your environment because the Application Express files are not up-to-date! The
files for version 20.1.0.00.13 have been loaded, but 20.2.0.00.20 is expected. Please verify that you
have copied the images directory to your application server as instructed in the Installation Guide.
How to solve this error?
The embedded PL/SQL Gateway (EPG) along with mod_plsql are no longer supported for Oracle APEX. This deprecation was announced in APEX 20.1.
Oracle REST Data Services (ORDS) is the only supported and documented Web listener for APEX. The configuration instructions are here. ORDS includes an embedded Web server, so in addition to being supported with Apache Tomcat and WebLogic Server, you can also run ORDS standalone.
I had the same problem after upgrading from APEX 18.2 to 20.2. I solved the problem by not executing this script. It seems that it isn't needed any longer. Update succeeded without running this script.
Attention: There is a pitfall: After upgrading you must clear your browser cache (only images). When I cleared the browser cache, the error message disappeared.

How can I access Oracle Apex login in my Android app via a rest interface?

I have a finished Oracle Apex application which is running in browser. Now I want to build a native Android app and access the data that is stored in the Oracle database.
First I need to authenticate the user with email/password login.
Second I want to send data to Oracle Apex over rest and store it in the database.
Is there a ready-made function of Oracle Apex that allows me to implement these things?
I think it is what you need: https://ruepprich.wordpress.com/2017/07/25/apex-basic-rest-authentication/
Also you can look at this project:
https://github.com/vincentmorneau/apex-pwa

Replacing mod_plsql with Oracle Rest Data Services

We are in the process of upgrading an application running on Oracle 10g and oracle HTTP server to Oracle 12C.
Due to mod pl/sql being deprecated we have chosen following combination.
oracle 12c + ORDS 3.0 and tomcat. (we are not using APEX)
A major functionality of our application is uploading files via website to the documents table in the database schema.
While doing that we are getting error "500 Internal Server Error" which has been experienced by others on this link https://community.oracle.com/thread/3891751
If anyone has got a sucessfull file upload into Documents table via Oracle Rest Data Services config I would like to know.
As far as I could prove, it is not possible to upload files with ORDS without having APEX installed. You will have to install APEX even if you do not use it in your application.
You can try another gateway but most are deprecated, I have started to develop one in Java without APEX dependencies. When I have it ready I will publish it in github.
You might want to have a look at the latest ORDS release as explained my own question related to this topic:
File uploads in a non-Apex PL/SQL application migrated to ORDS

How to find application builder in APEX 5 to build first application

I got started with oracle apex 5 and lately finished apex installation, I want to start building first application. I found in apex documentation that I should start with application builder but I didn't find it in my environment.
When I login to APEX, the environment appears as in this image:
You are logged into Oracle Application Express Administration Services (apex admin short) and not Application Express Workspace.
Apex Admin is the place where you manage Oracle Application Express instances and work-spaces and a workspace is an area within the Oracle Application Express development environment where developers can create applications.
If you just finish installing APEX I suggest you go over this configuration tutorial to configure the workspace and be able to build applications.
Cristian is correct, but this may help more:
You should go to this URL: http://localhost:8080/apex/ . You have to know the name of one of the workspaces you created, and a user with Admin or Developer role. These Workspace users can be created in the apex_admin site ( http://localhost:8080/apex/apex_admin/ ), under "Manage Workspaces" / "Manage Developers and Users". Also, Admin users of each Workspace can create new users once you get in.

is possible to build a warehouse application using Oracle Application Express oracle 11g?

I'm intermediate PHP ,MySQL developer,currently, I'm building a warehouse application using MySQL with InnoDB engine and using PHP,I notice it's too annoying and slow to handle many languages at the same time(PHP,MySQL,HTML,CSS),then after googling I found (Oracle Application Express),it's sounds nice to me that I build my application and focusing on one programming language Oracle and leave the forms etc to the Oracle Application Express.so is it possible to build a warehouse management system with Oracle Application Express and Oracle 11g ? I'm good with SQL and I can learn Oracle very fast,please guys share you experience with me.
Thanks in advance everyone.
you can access pl sql from apex applications and apex itself generate a web frontend.
yes you can also create a login page and the separate pages cann be secured by user specific access rights

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