Question: Database systems that store each relation in a separate operatin
Database systems that store each relation in a separate operating-system file may use the operating system’s security and authorization scheme, instead of defining a special scheme themselves. Discuss an advantage and a disadvantage of such an approach.
Answer to relevant QuestionsWhat are two advantages of encrypting data stored in the database?List all functional dependencies satisfied by the relation of Figure.Explain how functional dependencies can be used to indicate the following:• A one-to-one relationship set exists between entity sets account and customer.• A many-to-one relationship set exists between entity sets ...Show that it is possible to ensure that a dependency-preserving decomposition into 3NF is a loss less-join decomposition by guaranteeing that at least one schema contains a candidate key for the schema being decomposed.Give an example of a relation schema R and a set of dependencies such that R is in BCNF, but is not in 4NF.
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