The easiest way to interact with a database is to create a single connection directly to the database. Simple interaction is a straightforward database connection that doesn't use connection pools or other abstractions to maximize performance.

To connect to a PostgreSQL database, we can use two crates: postgres or r2d2_postgres. The first is a generic connection driver. The second, r2d2_postgres, is a crate for the r2d2 connection pools crate. We will start by using the postgres crate directly, without a pool from the r2d2 crate, and work on a simple utility to create a table, before adding commands to manipulate the data in that table.