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Lack of Redundancy We have talked about the problems of repetition of information in a database. Such repetition should be stay away as much as possible. Let us state once again t
What is a data dictionary? Data Dictionary is a main source of data in a data management system. Its major function is to carry the creation and management of data definition
Which language has presently become the defacto standard for interfacing application programs along with relational database system? The language which has recently become the
What is authorization graph? Passing of authorization from single user to another can be shown by an authorization graph.
Types of Data fragmentation
Discuss the differences among the candidate keys and the primary key of a relation. Give instance to describe your answer? A candidate key is one that can be used as primary ke
Which is an advantage of view? The Advantages of view is Data security, Derived columns and Hiding of complex queries
, write the relational schema, and draw the new dependency diagrams. Identify the normal forms for each table structure you created
Construct a generalization-specialization hierarchy for a motor-vehicle sales company. The company sells motorcycles that comprise an engine number and cost; cars that have a chass
Defining Internal Classes and Operations When we enlarge algorithms, new classes can be added to the store intermediate results. A complex operation could be looked at, as a c
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