Comprehensive SQL Learning: Understand the fundamentals and dive into advanced SQL techniques, such as complex joins, subqueries, and window functions. Database Design Best Practices: Learn about ...

What's a little-known or underrated SQL Server feature that you wish more people knew about? My favourite right now is Ledger Databases and Tables.

Read this SQL tutorial to learn when to use SELECT, JOIN, subselects and UNION to access multiple tables with a single statement.