SQL. Pocket guide

If you are an analyst or data processing engineer and use SQL, the popular pocket guide will be the perfect assistant for you. Find numerous examples that reveal all the complexities of the language, as well as key aspects of SQL when used in Microsoft SQL Server, MySQL, Oracle Database, PostgreSQL, and SQLite.
In the updated edition, Alice Zhao describes how SQL is used in these DBMS to form queries and make changes to the database. Get detailed information on data types and their conversions, regular expression syntax, window functions, PIVOT and UNPIVOT operators, and much more.