This text is suitable for those who intend to learn or deepen their knowledge about SQL.
The SQL language concerns the programming of the databases, with that language we can create, modify, manage all that concerns a Database.
It is a universal language in the sense that most of its instructions can also be inserted into a programming language that is not SQL, but C Sharp, VB, and so on to manipulate databases directly from a program that is being developed.
In this text we will find most of the commands and then SQL statements, then still functions, or how to create VISES, STORED PROCEDURES, and so on.
All this is explained by simple examples, avoiding encountering long and complex
