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Explain trivial dependency?
Functional dependency of the form α ->β. is trivial if α C β. Trivial functional dependencies are satisfied by all the relations.
what are the reasons having variable length records
For problems 1-4, give all candidate keys for the tables with FDs specified. Composite candidate keys must be put in parentheses, and candidate keys must be separated with commas
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what is definition hierarchical data model
SET concept is used in which type of modelling? SET concept is used in Network Model.
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