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The purpose of this paper is to discuss the various models of databases, Hierarchical, Network, Relational, OO and Multi-dimensional.
A Hierarchical database is a database that is organized in a tree structure, in which each record has only one owner. The data is structured such that the units of data storage are connected by a hierarchically defined pathway. In a Hierarchical database, the relationships are of a parent-child nature where each child entity is related to only one parent entity. Speed is an advantage to this type of database because the structure is so simple. The draw-back is “To get any information from the hierarchical database a user has to have an intimate knowledge of the database structure; and the structure itself was extremely inflexible” (Hu, 2008, chap...
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