Databse Approach Advantages and Disadvantages Essay Example for Free
Databse Approach Advantages and Disadvantages Essay
Each individual record is represented as a row, and each attribute as a column. Entity types are related to each other using 1:N mappings, also known as one-to-many relationships. This model is recognized as the first database model created by IBM in the 1960s. The network structure consists of more complex relationships. Unlike the hierarchical structure, it can relate to many records and accesses them by following one of several paths. In other words, this structure allows for many-to-many relationships. The network model is a database model conceived as a flexible way of representing objects and their relationships.
Its distinguishing feature is that the schema, viewed as a graph in which object types are nodes and relationship types are arcs, is not restricted to being a hierarchy or lattice. Example of a Network Model. The network models original inventor was Charles Bachman, and it was developed into a standard specification published in 1969 by the CODASYL Consortium.