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 ...

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 ...

Information is stored somewhere. Sometimes it’s not suited for its original location. If you’re running low on disk space, added a new drive array, or just curious; this is a simple procedure to move ...

A graduate in Edinburgh has drawn thousands of users to a website he built while searching for work, after turning SQL practice into a set of detective cases instead of conventional tutorials.