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Describe Participation Constraints?
Participation Constraints - The participation constraint exacts whether the existence of an entity depends on its being related to another entity through the relationship type. This constraint specifies the minimum number of relationship examples in which each entity can participate in. It is sometimes known as the minimum cardinality constraint. There are two kinds of participation constraints - total and partial.
Key to represent relationship amongs tables is called ? A Key that represent the relationship between tables is called Foreign Key.
distributed quey processing
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The users who use easy-to-use menu are called ? The users who use easy to use menu are called as Naïve users.
Explain Instance and schemas? Instances and schemas: Databases changes over time as the information is deleted and inserted. The collection of information stored in database
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