Most of the text SQL trying to serve as an encyclopedic reference on SQL syntax - a counterproductive approach, because this information is already available in the online reference, published by the major database vendors. Numerous features make the LANGUAGE SQL unique among introductory SQL books. Finally, this book covers the syntax of the widely used three databases: Microsoft SQL Server, MySQL, and Oracle, with a special "Different Database" box that will show the differences in syntax between the three databases, as well as instructions on how to obtain and install the free version of database. This is a book that only you will need to gain knowledge of SQL and relational databases.