Querying across multiple schemas can be useful, for example if: • You want easy administrative controls for impersonating a customer • You want to run busines

Querying across multiple schemas can be useful, for example if: • You want easy administrative controls for impersonating a customer • You want to run business queries across multiple customers • You integrate authentication with your database, so you don't need a separate service to tell your application "which" database endpoints to use with your username. • You want to simplify sysadmin job of managing a single database instead of thousands of databases. And so on. Sometimes these things are worth giving up the "simple" isolation.