More Exotic Databases
Besides relational databases, there are several other kinds of more exotic databases. This book focuses on relational databases, so these are only mentioned briefly here. If you think you could benefit from one of these more unusual types of database, you can search the Web for more information.
A hierarchical database stores data in a hierarchical, tree-like structure. A typical computer’s file system is a form of a hierarchical database. A directory or folder contains files and other directories or folders. In some file systems, links or shortcuts allow relationships between directories and files that break the normal hierarchical model. For example, a shortcut in one directory might invoke a program stored in another. ...
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