# SQL and relational databases

> Learn tables, queries, joins and data modelling with original exercises.

Prerequisites: Basic computing and simple data tables.

Short self-study course; not an accredited qualification or a complete university syllabus.

## Lessons

- [Tables, rows and keys](https://studybrix.com/en/courses/sql-databases/free-sql-tables/index.md): university; 8 questions.
- [SELECT, filtering and sorting](https://studybrix.com/en/courses/sql-databases/free-sql-query/index.md): university; 8 questions.
- [Joins and relationships](https://studybrix.com/en/courses/sql-databases/free-sql-joins/index.md): university; 8 questions.
- [Transactions and safe querying](https://studybrix.com/en/courses/sql-databases/free-sql-safety/index.md): university; 8 questions.