Shelley Doll finishes her coverage of SQL data types with an overview of datetime and interval data types. Learn more about the basic syntax of these standard SQL types.

In this tutorial, we will step through installing PostgreSQL, connecting to the database, loading some data, and running a variety of SQL queries.

Note: The DISTINCT data type behaves differently from other advanced SQL data types. Being a user-defined type that is based on an already existing built-in types, it has no interface as its mapping ...