To get the most out of this book

In order for this book to be useful, you need access to a PostgreSQL client that is allowed to execute queries on a server. Ideally, you'll also be the server administrator. Full client and server packages for PostgreSQL are available for most popular operating systems at http://www.postgresql.org/download/. All the examples here are executed at the Command Prompt, usually running the PSQL program. This makes them applicable to most platforms. It's straightforward to do most of these operations by using a GUI tool for PostgreSQL, such as pgAdmin or OmniDB:

• pgAdmin: https://www.pgadmin.org/download/
• OmniDB: https://omnidb.org/en/downloads-en