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3NF Normal Form
A relation schema R is in 3NF if it is in 2NF and for each FD X A either of the following is true
In other words, if every non prime attribute is non-transitively related on primary key.
Define multivalued dependency. What do understand by trivial multivalued dependency? Ans: A multivalued dependency is a full constraint among two sets of attributes in a rela
exercise solution
Give an example of Object Representation For illustration, consider the implementation of a social security number within an employee object that is shown in Figure. The soci
Write short notes on extension and intension? In any data model, it is significant to distinguish among the description of the database and the database itself the description
we need example of 2phase locking
what is cascading rollback
What are composite objects? Objects that have other objects are known as complex objects or composite objects.
What is DAG? The class-subclass relationship is shown by a directed acyclic graph.eg: employees can be temporary or permanent. We might be create subclasses temporary \and perm
why older data models are being replaced by new data models.
Define object-relational systems? Systems that give object-oriented extensions to relational systems are known as object-relational systems.
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