There are now five SQL books in this series, pick the one that best meets your need. For generic non-DBMS specific SQL, you’ll want Sams Teach Yourself SQL In 10 Minutes. To learn MariaDB, Microsoft SQL Server T-SQL, MySQL, or Oracle PL/SQL, you’ll want the books specific to those DBMSs.

Sams Teach Yourself SQL in 10 Minutes
Now in its 5th edition, with over 1/4 million copies sold, and available in 10 languages, this is the best-selling introductory SQL book of all time! If you are just getting started with SQL, and are looking for the quickest path to success (not tied to any specific DBMS or SQL implementation), then this is the book you want.

MariaDB Crash Course
MariaDB is an alternative to MySQL, one of the most popular database management systems in the world. This book builds on the best-selling Sams Teach Yourself SQL in 10 Minutes, and provides more detailed coverage specific to MariaDB. If you are new to MariaDB, then this is the book you want.

MySQL Crash Course
MySQL has become one of the most popular database management systems in the world. This book builds on the best-selling Sams Teach Yourself SQL in 10 Minutes, and provides more detailed coverage specific to MySQL. If you are new to MySQL, then this is the book you want.

Sams Teach Yourself Microsoft SQL Server T-SQL In 10 Minutes
SQL Server is one of the most popular and important database management systems in the world. This book builds on the best-selling Sams Teach Yourself SQL in 10 Minutes, and provides more detailed coverage specific to Microsoft SQL Server and T-SQL. If you are new to SQL Server and T-SQL, then this is the book you want.

Sams Teach Yourself Oracle PL/SQL In 10 Minutes
The Oracle family of DBMSs are among the most deployed and used in the world. This book builds on the best-selling Sams Teach Yourself SQL in 10 Minutes, and provides more detailed coverage specific to Oracle and PL/SQL. If you are new to Oracle and PL/SQL, then this is the book you want.