MS Access is often a great tool for this. It works well for datasets that are too big for Excel, but too simple (1 table, only 5mm rows) for a true database app

MS Access is often a great tool for this. It works well for datasets that are too big for Excel, but too simple (1 table, only 5mm rows) for a true database app. Plus, if your comfort level is closer to Excel than MySQL, or you have experience writing Excel macros/userforms, you can do well in Access. Just promise you will get a proper database if your needs continue to grow; I have seen too many frankensteinian monstrosities grow from once-orderly Access databases!