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Define object-relational systems?
Systems that give object-oriented extensions to relational systems are known as object-relational systems.
What are the parts of SQL language? The SQL language has various parts: data - definitition language Data manipulation language View definition Transaction contr
QUESTION (a) Consider a car database consisting of car model, car make, car origin, Engine capacity, color, cost.
explain cascading rollback
What are the ways in which the variable-length records arise in database systems? Storage of many record types in a file. Record types that permit variable lengths for one o
Security: In a centralised system, access to the data can be simply controlled. Though, in a distributed DBMS not only does access to replicated data have to be controlled in many
The data of a view is not physically stored, but derived from one or more tables. True the data of a view is not physically stored
what is Mapping Constraints? with examples
In an organisation various projects are undertaken. Each projects can employ one or more employees. Every employee can work on one or more projects. Each project is undertaken on
What are the four main characteristics of the database approach? The four major characteristics of the database approach are: 1. Self-describing nature of a database system. 2.
Define hot swapping? Hot swapping permits the removal of faulty disks and changes it by new ones without turning power off. Hot swapping decreases the mean time to repair.
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