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Database Software Paradigms
Network Model: The network is an elaborated version of the hierarchical structure, giving access to many-to-many relationships through a tree-like structure, thus, allowing multiple parents. It organizes data through two fundamental concepts; records and sets.
Entity-Relationship Model: This model was developed for database design by Peter Chen. An entity is a thing that exists either physically or logically. For example, car, house, book, etc. Entities are linked to each other through relationships.
Relational Model: It was first described in 1969 by E.F. Codd. In this model, data is stored in form of tables called relations. Each row of table holds one record known as TUPLE. Each columnof table is called ATTRIBUTES.
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