They are not meant as examples for you to follow in designing tables for any purpose. The following list describes the files that contain examples and data that are used in this book. These files are ...

A database that maintains a set of separate, related files (tables), but combines data elements ... is a relational DBMS (RDBMS) (see DBMS). In non-relational "hierarchical" and "network ...

A question asked about data contained in two or more tables in a relational database. The relational query must specify the tables required and what the condition is that links them; for example ...