This book, written by specialists of MySQL AB, is a comprehensive guide to the SQL language, which is used to organize database queries, as well as the features of the implementation of the SQL standard in the MySQL server .. In fact, this is the official documentation of the manufacturer . The book covers the full range of issues related to language structure, allowable column types, operators, operations and functions, as well as existing MySQL extensions, in addition, provides information intended for experienced programmers and administrators. As you know, MySQL occupies a leading position among many open source database management systems. Due to the high performance and ease of configuration, a rich selection of APIs, as well as functional means of working with networks, the MySQL server has become one of the most successful options for developing Web applications that interact with databases. The book is designed for developers of Web applications and administrators of any qualification, as well as for students and teachers of relevant disciplines.