PostgreSQL is a well-known and powerful relational database. But it is increasingly a platform that can integrate with other databases and storage systems, using a number of “foreign data wrappers” and other integration mechanisms. How do these work, and how do they allow you to read from and write to other PostgreSQL servers, relational database systems, and even NoSQL systems? And how can PostgreSQL thus become the center of a heterogeneous database federation, rather than a standalone server? In this talk, Jim Mlodgenski introduces the theory and practice of combining various database systems into a single system, all coordinated by PostgreSQL.