This is the problem with large company. They always "want" the applications to be "enterprise" level. Even if it's just a report generation tool to automate some simple task, use Oracle because they already have a large team that will take care of the database, why use mySQL and risk unforeseen issues down the road?

I have even seen a super super tool that simply allow user to go through a questionnaire, which a paper print out will more than likely enough and faster, to be implemented as an Oracle database, with the business logic embedded inside the database, and a super thin UI. User will need to know the correct schema name to use though, because they use schemas for versioning, and it's not like 1.0 and 1.1, it's latest_with_iso_compliace, test_only_production_for_customer_A and beta_for_production or similar.