Beginner

SQL & Databases

Query relational data with confidence.

Learn SQL for real applications: SELECT, joins, aggregation, indexes, and safe updates.

Course outline

1. Module 1: Query foundations

   • SQL full course overview
   • WHERE, ORDER BY, LIMIT
   • Practice queries

2. Module 2: Joins and design

   • INNER and LEFT JOIN
   • Keys and normalization
   • SQL quiz