SQL. Pocket Guide. 4th edition. Zhao E.

If you are an analyst or data processing engineer and use SQL, a popular pocket directory will be an ideal assistant for you. Find many examples that reveal all the difficulties of the language, as well as the key aspects of SQL when using it in Microsoft SQL Server, MySQL, Oracle Database, PostgreSQL and SQLite. SQL for the formation of requests and making changes to the database. Get detailed information about the types of data and their transformations, the syntax of regular expressions, window functions, Pivot and Unpivot operators and much more.