classification of data models and explain them in dbms
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database model is a type of data model that determines the logical structure of a databaseand fundamentally determines in which manner data can be stored, organized and manipulated. The most popular example of a database model is the relational model, which uses a table-based format.
ExamplesEdit
Common logical data models for databases include:
Hierarchical database model
It is the oldest form of data base model. It was developed by IBM for IMS (information Management System). It is a set of organized data in tree structure. DB record is a tree consisting of many groups called segments. It uses one to many relationships. The data access is also predictable.
Network model
Relational model
Entity–relationship model
Enhanced entity–relationship model
Object model
Document model
Entity–attribute–value model
Star schema
An object-relational database combines the two related structures.
Physical data models include:
Inverted index
Flat file
Other models include:
Associative model
Correlational model
Multidimensional model
Multivalue model
Semantic model
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ExamplesEdit
Common logical data models for databases include:
Hierarchical database model
It is the oldest form of data base model. It was developed by IBM for IMS (information Management System). It is a set of organized data in tree structure. DB record is a tree consisting of many groups called segments. It uses one to many relationships. The data access is also predictable.
Network model
Relational model
Entity–relationship model
Enhanced entity–relationship model
Object model
Document model
Entity–attribute–value model
Star schema
An object-relational database combines the two related structures.
Physical data models include:
Inverted index
Flat file
Other models include:
Associative model
Correlational model
Multidimensional model
Multivalue model
Semantic model
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