3. Introduction to SQL
SQL1 is a database manipulation language that has been implemented by virtually every relational database management system (DBMS) intended for multiple users, partly because it has been accepted by ANSI (the American National Standards Institute) and ISO (International Standards Organization) as a standard query language for relational databases.
1Whether you say “sequel” or “S-Q-L” depends on how long you've been working with SQL. Those of us who have been working in this field for longer than we'd like to admit often say “sequel,” which is what I do. When I started using SQL, there was no other pronunciation. That is why you'll see “a SQL” (a sequel) rather than “an SQL” (an es-que-el) throughout this book. Old habits ...
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