The licensing for products such as Oracle's ERP are very costly in Pakistan, so my company's upper management recommended that we develop our own custom ERP system. At the time, we had two choices, one of them being Oracle ADF, and our management eventually decided that we should use ADF.
For this work, I am currently using the latest version of ADF with Database 19C, and before developing our applications in ADF, we also have to install Oracle JDeveloper.