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Define Specialisation and generalization in brief?
Specialisation / generalization: Generalization or Specialization represents the is a relationship set, an necessary element of the object oriented paradigm. The major idea in Generalization/Specialization is in which one object class (the specialization) is a subset of another (the generalization).
We need help in Booking System for Golf Business Development of a web based booking system which permits clients to book golf lessons with the following features- a) 4 user p
Differance between internal and external schema? Internal and external schema: Internal Schema • Describes the physical storage structure • Uses a physical data model External
How does the two phase protocol ensure serializability in database schedules? Ans: A transaction is termed to follow the two-phase locking protocol if all locking operations
Describe relational model? Structure of relational data base Basic structure Database schema Keys Schema diagram Query languages
Which method is used to key transformation ? A hash method is used to key transformation.
All edges of a cube are expanding at a rate of 6 centimeters per second. How fast is the surface area changing when each edge is (a) 2 centimeters and (b) 10 centimeters?
What's the difference between a primary key and a unique key? Both primary key and unique key enforces uniqueness of the column on which they are explained. But by default prim
The Second Normal Form (2NF) Definition: A relation is in 2NF if it is in 1NF and each non-key attribute is fully dependent on each candidate key of the relation. Some of th
Ways for Selecting Data Structure Algorithms operate on data structure. Therefore, selection of the best algorithm means selecting the best data structure from whole bunch. Th
give some example real life situation where DBMS are most suitable
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