The easiest way to understand a database is as a collection of related files. Imagine a file (either paper or digital) of sales orders in a shop. Then there’s another file of products, containing stock records. To fulfil an order, you’d need to look up the product in the order file and then look up and adjust the stock levels for that particular product in the product file. A database and the software that controls the database, called a database management system (DBMS), helps with this kind of task.
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This book delivers a thorough discussion of the foundations of the relational model of database design along with a systematic treatment of the formal theory for the model.
This book introduces you to the theory of relational databases, and SQL, focusing on the application of that theory to the design of computer languages that properly embrace it. The book is intended for those studying relational databases as a part of a degree course in Information Technology (IT).
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