I'm migrating my Sitecore DBs from a local installation to Azure PaaS SQL instances using SSMS. I've successfully migrated Core, Master, Web and, with a small edit, Session. I'm having problems with the Analytics database. Even after it fails, Sitecore seems to still work fine with the database, but I'm sure there are unseen consequences.
What is the Analytics db used for? Do I need it if I'm using MongoDB for xDB?