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Explain the use of constraints in functional model with suitable example. A constraint shows relationship between two objects at same time, or among various values of the sam
What is an index? An index is a structure that helps to place desired records of a relation quickly, without probing all records.
Write short notes on relational model The relational model uses a collection of tables to show both data and the relationships between those data. The relational mo
What is meant by buffer blocks and disk buffer The blocks residing temporarily in main memory are referred to as buffer blocks. The area of memory where blocks reside t
What is an Index? An index is a small table having only two columns. The first column has a copy of the primary or candidate key of a table and the second column having a set o
Demonstrate the Design of associations During object design phase we must design a strategy to implement associations. Association may be unidirectional or bi-directional. Wha
Before defines the second type of integrity constraint, viz., Entity Integrity, we should be well-known with the concept of NULL. Mostly, NULL is intended as a basis for dealing
PRINCIPLES OF DATABASE 1. State the following terms: a) Database b) Database Management System c) Entity d) Attribute e) Relationship 2. Discuss the Three Level Architecture
About Attribute inheritance
what is binary relationship
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