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WHAT IS DBMS
Define entity integrity and referential integrity. How does SQL allow specification of these? Ans: Entity Integrity Rule- If the attribute A of relation R is a prime attribut
Need for Multiple Access Paths In practice, most of the online information systems need the support of multi-key files. For example, consider a banking database application hav
task upload
Normal 0 false false false EN-IN X-NONE X-NONE
What are the uses of functional dependencies? To test relations to see whether they are legal under a given set of functional dependencies. To state constraints on the set
What is Alternate Key Alternate Key: This is the candidate key which is not taken as the primary key of the table. They are named so because although not the primary key, the
what is entity in database system?
The need for three level architecture The aim of the three level architecture is to divide each user's view of the database from the way the database is physically shown.
In which relational modes, cardinality is termed? Answer : Cardinality is termed in a number of tuples relational modes.
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