Lesson 1. Understanding SQL
In this lesson, you learn about databases and SQL, prerequisites to learning T-SQL.
The fact that you are reading this book indicates that you, somehow, need to interact with databases. So before diving into SQL Server and its T-SQL implementation of the SQL language, it is important that you understand some basic concepts about databases and database technologies.
Whether you are aware of it or not, you use databases all the time. Each time you select a name from your email address book, you are using a database. If you conduct a search on an Internet search site, you are using a database. When you log into your network at work, you are validating your name and password against a database. Even when ...