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Objectives
Cardinality shows the number of instances of an entity associated with another entity participating in a relationship. Depend on the cardinality binary relationship can be further
Describe relational model? Structure of relational data base Basic structure Database schema Keys Schema diagram Query languages
Define functional and multivalued dependencies. Ans: A functional dependency is a assets of the semantics of the attributes in a relation. The semantics point out how at
What is meant by mean time to failure? The mean time to failure is the amount of time that the system could run continuously without failure.
File Organisation In Dbms Introduction Databases are used to store information. Usually, the principal operations we have to perform on database are those relating to:
random file sharing
In an E-R diagram how attributes are represented ? In an E-R diagram attributes are represented in a ellipse.
Explain the term- Periodic recomputation Periodic recomputation: Base values are often updated in bunches. Sometimes, it is possible to just recompute all derived attributes p
What type of view of total database content? Data base content Conceptual view of total database contain.
a) Suppose we updated the catalog tables in real time, that is, after every update, insert, or delete SQL statement were executed-rather than only running RUNSTATS once every few
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