ture. In this structure, the logical relationships between data elements may be more complex than is possible in the hierarchical structure, because this structure permits relationships to be many-to-many, as opposed to the one-to-many restriction in the hierarchical structure. With the many-to-many relationships characteristic, the network structure permits entry into a database at multiple points.
3. Relational structure. This structure was developed in an effort to simplify the representation of complex relationships between data elements in very large databases. In the rel
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