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What is conceptual schema? The schemas at the view level are known as subschema that describe dissimilar views of the database.
To delete a particular column in a relation which command is used ? To delete a particular column in a relation ALTER command is used.
Explain the three data models namely relational, network and hierarchical and evaluate their relative advantages and disadvantages. Hierarchical Model: In hierarchical model, da
What are the two types of serializability? The two types of serializability is a) Conflict serializability b) View serializability
The participation Constraints shows whether the existence of an entity depends on its being associated to another entity by the relationship type. There are two kinds of participat
List the table modification commands in SQL? A) Deletion B) Updates C) Insertion D) Update of a view
Ancestry database records information about family trees . Following information is recorded about each person: FIRSTNAME first name SURNAME surname MNAME maiden name (if
What are composite objects? Objects that have other objects are known as complex objects or composite objects.
Question 1 Discuss on transmission impairments Question 2 What is framing? Question 3 Write a note on 10Base2 10Base- T Question 4 Explain the rev
We will explain here an example database application having COLLEGE database and use it in showing several E-R modelling concepts. College database remains track of faculty, Stu
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