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Define object-relational systems?
Systems that give object-oriented extensions to relational systems are known as object-relational systems.
Describe the functions and features of foreign key? Foreign Key : The primary key of one file or table that is implanted in another file or table to implement the relationships
What are the properties in a relation ? In a relation Ordering of rows is immaterial and No two rows are identical.
Define outer union operation of the relational algebra. Compute the outer union for the relations R and S given below. Outer Join - If there are any values in one tabl
What is Message switching Message switching transmits data units which can be arbitrarily long. Packet switching has a utmost packet size, if any message longer than that, it s
Question: One of the tasks a database management system must perform is to ensure that the data is still intact in the face of software and hardware failure. This task is known
The users who use easy-to-use menu are called ? The users who use easy to use menu are called as Naïve users.
explain exhausitively the problems associated with er diagrams with ellustrations
What is the function of IO/M signal in the 8085? It is a status signal. It is used to differentiate among memory locations and I/O operations. When this signal is low (IO/M = 0
prototype of a distributed information system for a national car part retail outlet chain.
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
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