datamodels, Database Management System

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explain thee diffrent types of data models

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What is known as a search key? An attribute or set of attributes used to look up records in a file is known as a search key.

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Explain Superkey Ans: A superkey is described in the relational model of database organization like a set of attributes of a relation variable for which it holds that in all re

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Describe Parameteric end users? Parametric end users might be given update access, but are commonly not permitted to change the structure of data.

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List some instances of collection types? a) sets b) arrays c) multisets

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What is Oracle databse structure? Oracle database structure: The relational model has three main aspects: Structures: Structures are well-defined objects which store th

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Support by Adding Indexes Multiple indexes can be used to access a data file by multiple access paths. In such a scheme only single copy of the data is consider, only the numbe

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