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== Understanding Database Tables ==

Database ''Tables'' provide the most basic level of data structure in a database. Each database can contain multiple tables and each table is designed to hold information of a specific type. For example, a database may contain a ''customer'' table which contains the name, address and telephone number for all the customers of a particular business. The same database may also include a ''products'' table used to store the product descriptions with associated product codes for the items sold by the business.

Throughout the remainder of this book particular attention will be paid to explaining the key SQL commands so that the reader will be proficient in using SQL to read and write database data.

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