SQLtest: up your SQL skills

T-SQL Fundamentals by Itzik Ben-Gan

Master Transact-SQL's fundamentals, and write correct, robust code for querying and modifying data with modern Microsoft data technologies, including SQL Server 2022, Azure SQL Database, and Azure SQL Managed Instance.

Learn PostgreSQL: Use, manage and build secure and scalable databases with PostgreSQL by Luca Ferrari & Enrico Pirozzi

This new edition will help you learn PostgreSQL from scratch with the latest version, providing a complete focused view on aspects like configuration, high performance, partitioning, backup, server-side programming and replication.

SQL in 10 Minutes a Day by Ben Forta

Whether you're an application developer, database administrator, web application designer, mobile app developer, or Microsoft Office users, a good working knowledge of SQL is an important part of interacting with databases. And Sams Teach Yourself SQL in 10 Minutes offers the straightforward, practical answers you need to help you do your job.

PostgreSQL 14 Administration Cookbook by Simon Riggs

Over 175 proven recipes for database administrators to manage enterprise databases effectively. This Postgres 14 book is for database administrators, data architects, database developers, and anyone with an interest in planning and running live production databases using PostgreSQL 14. Those looking for hands-on solutions to any problem associated with PostgreSQL 14 administration will also find this book useful. Some experience with handling PostgreSQL databases will help you to make the most out of this book, however, it is a useful resource even if you are just beginning your Postgres journey.