Oracle Application Express API Reference describes the Application Programming Interfaces, referred to as APIs, available when programming in the Oracle Application Express environment. To utilize these APIs, such as APEX_JSON, when not developing with Oracle Application Express, you need to install Oracle Application Express into the database.


Oracle Application Express API Reference is intended for application developers who are building database-centric web applications using Oracle Application Express. The guide describes the APIs available when programming in the Oracle Application Express environment.

To use this guide, you need to have a general understanding of relational database concepts and an understanding of the operating system environment under which you are running Oracle Application Express.

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For a description of PL/SQL subprogram conventions, refer to the Oracle Database PL/SQL Language Reference. This document contains the following information:

  • Specifying subprogram parameter modes

  • Specifying default values for subprogram parameters

  • Overloading PL/SQL subprogram Names

The following text conventions are used in this document:

Convention Meaning


Boldface type indicates graphical user interface elements associated with an action, or terms defined in text or the glossary.


Italic type indicates book titles, emphasis, or placeholder variables for which you supply particular values.


Monospace type indicates commands within a paragraph, URLs, code in examples, text that appears on the screen, or text that you enter.