# Requirements and limitations
<a name="Appendix.Oracle.Options.APEX.Requirements"></a>

The following topic lists the requirements and limitations for Oracle APEX and ORDS.

## Oracle APEX version requirements
<a name="Appendix.Oracle.Options.APEX.versions"></a>

The `APEX` option uses storage on the DB instance class for your DB instance. Following are the supported versions and approximate storage requirements for Oracle APEX.


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| Oracle APEX version | Storage requirements | Supported Oracle Database versions | Notes | 
| --- | --- | --- | --- | 
|  Oracle APEX version 24.2.v1  |  114 MiB  |  All  |  This version includes patch 37885097: PSE BUNDLE FOR APEX 24.2 (PSES ON TOP OF 24.2.0), PATCH\$1VERSION 4.  | 
|  Oracle APEX version 24.1.v1  |  112 MiB  |  All  |  This version includes patch 36695709: PSE BUNDLE FOR APEX 24.1 (PSES ON TOP OF 24.1.0), PATCH\$1VERSION 3. If you need exactly the same APEX images version to install on your EC2 instance, download patch 37544819: 24.1.3 PSE BUNDLE FOR APEX 24.1 (PSES ON TOP OF 24.1.0).  | 
|  Oracle APEX version 23.2.v1  |  110 MiB  |  All  |  This version includes patch 35895964: PSE BUNDLE FOR APEX 23.2 (PSES ON TOP OF 23.2.0), PATCH\$1VERSION 6. If you need exactly the same APEX images version to install on your EC2 instance, download patch 37593125: 23.2.6 PSE BUNDLE FOR APEX 23.2 (PSES ON TOP OF 23.2.0).  | 
|  Oracle APEX version 23.1.v1  |  106 MiB  |  All  |  This version includes patch 35283657: PSE BUNDLE FOR APEX 23.1 (PSES ON TOP OF 23.1.0), PATCH\$1VERSION 2.  | 
|  Oracle APEX version 22.2.v1  |  106 MiB  |  All  |  This version includes patch 34628174: PSE BUNDLE FOR APEX 22.2 (PSES ON TOP OF 22.2.0), PATCH\$1VERSION 4.  | 
|  Oracle APEX version 22.1.v1  |  124 MiB  |  All  |  This version includes patch 34020981: PSE BUNDLE FOR APEX 22.1 (PSES ON TOP OF 22.1.0), PATCH\$1VERSION 6.  | 
|  Oracle APEX version 21.2.v1  |  125 MiB  |  All  |  This version includes patch 33420059: PSE BUNDLE FOR APEX 21.2 (PSES ON TOP OF 21.2.0), PATCH\$1VERSION 8.  | 
|  Oracle APEX version 21.1.v1  |  125 MiB  |  All  |  This version includes patch 32598392: PSE BUNDLE FOR APEX 21.1, PATCH\$1VERSION 3.  | 
|  Oracle APEX version 20.2.v1  |  148 MiB  |  All except Oracle Database 21c  |  This version includes patch 32006852: PSE BUNDLE FOR APEX 20.2, PATCH\$1VERSION 2020.11.12. You can see the patch number and date by running the following query: <pre>SELECT PATCH_VERSION, PATCH_NUMBER <br />FROM   APEX_PATCHES;</pre>  | 
|  Oracle APEX version 20.1.v1  |  173 MiB  |  All except Oracle Database 21c  |  This version includes patch 30990551: PSE BUNDLE FOR APEX 20.1, PATCH\$1VERSION 2020.07.15.  | 
|  Oracle APEX version 19.2.v1  |  149 MiB  |  All except Oracle Database 21c  |  | 
|  Oracle APEX version 19.1.v1  |  148 MiB  |  All except Oracle Database 21c  |  | 

For downloadable Oracle APEX .zip files, see [ Oracle APEX Prior Release Archives ](https://www.oracle.com/tools/downloads/apex-all-archives-downloads.html) on the Oracle website.

## Oracle APEX and ORDS prerequisites
<a name="Appendix.Oracle.Options.APEX.PreReqs"></a>

Note the following prerequisites for using Oracle APEX and ORDS:
+ Your system must use the Java Runtime Environment (JRE).
+ Your Oracle client installation must include the following:
  + SQL\$1Plus or SQL Developer for administration tasks
  + Oracle Net Services for configuring connections to your RDS for Oracle DB instance

## Oracle APEX limitations
<a name="Appendix.Oracle.Options.APEX.limitations"></a>

You can't modify the `APEX_version` user account, which is managed by Amazon RDS. Thus, you can't apply database profiles or enforce password rules on this user. The profiles and password settings for `APEX_version` are predefined by Oracle and AWS and are designed to meet the security requirements for Amazon RDS.