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Define the five basic operators of relational algebra? Five basic operators of relational algebra are: 1. Union (∪∪∪∪) - Selects tuples which are in either P or Q or in both
A student entity type has the following attributes,name..
Implementation of association as an object Implement as a separate association object, independent of either class, as in Figure. An association object is a group of pairs
define attribute inheritance with example?
10A.53 Code an Oracle Database trigger to enforce the constraint that an employee can never change his or her department. 10A.54 Code an Oracle Database trigger to allow the delet
What are the various forms of data transparency? a) fragmentation transparency b) replication transparency c) location transparency
Hierarchical
Fundamentals of Database Management 1. Explain the concept of Foreign Key. How a foreign key differs from a Primary Key? Can the Foreign Key accept nulls? 2. With a necess
Every simple attribute of an entity type have a possible set of values that can be attached to it. This is known as the domain of an attribute. An attribute cannot have a value out
what are the purposes of dbms in details
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