By "Oracle is our new ERP system," do you mean that you are transferring your own code to a system based on an Oracle database?
If so, the Oracle Database Concepts Guide is probably the first place you should start. Obviously, there is a big learning curve for this, and it will take time, but as a person who understands the existing system, you definitely win.
If you mean that you are moving to a supplier’s ERP system (the oracle that is the supplier), there are many systems that Oracle has launched on the market, and each of them has a different technological framework and basic components. For example, if you upgrade to Oracle Apps 11i or E-Biz modules, Java and Oracle Database will be the main components that you need to focus on first. If the ERP system is the new Fusion Applications suite , the Oracle ADF Framework is the place to start.
By the way, any specific reason why they have such a huge HUGE shift in the technology stack? source
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