GRADE 12 Database Models Very Important Question
Class 12 National Examination Board Nepal.
Class 10 Secondary Education Examination Nepal.
Define Hierarchical Model of Database. List out its advantages and disadvantages, too.
It is one of the oldest models of database design developed by IBM in the 1960s. In this model, the logical relationship is created among the data or files used in the database, in a hierarchical order. In this hierarchy, data are stored from the root, nodes or trunks and up to the leaves. It can be known as the top-down structure or upside-down tree structure of the database model…………..
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Prepared by: Er. Krishna Mahat