Follow this step-by-step guide to install PostgreSQL, load data, connect to a database, and execute SQL queries including table joins PostgreSQL is an open-source, object-relational (also called ...

Overview: Consistent SQL practice across varied platforms builds real job-ready confidence.Guided lessons help beginners, while timed challenges sharpen intervi ...

SQL is the world’s most popular language for managing and manipulating databases. Today, Codecademy launched a free Learn SQL interactive course that will teach you the basics of tables, queries, ...

We list the best SQL online courses, to make it simple and easy to learn how to mange, code, and run databases, covering everything from beginner to advanced users. The Structured Query Language or ...

The best things in life are free. Sign up for our email to enjoy your city without spending a thing (as well as some options when you’re feeling flush). Our newsletter hand-delivers the best bits to ...

Read this SQL tutorial to learn when to use SELECT, JOIN, subselects and UNION to access multiple tables with a single statement. It’s sometimes difficult to know which SQL syntax to use when ...