Define the boyce-codd normal form, Database Management System

Assignment Help:

Define the Boyce-Codd Normal Form with instance and also Compare BCNF and 3NF.

 Ans: BCNF: For each functional dependency X->Y in a set F of functional dependencies over relation R, either: 

  • Y is a subset of X or,
  • X is a superkey of R

 While

3NF: For each functional dependency X->Y in a set F of functional dependencies over relation R, either:  

  • Y is a subset of X or,
  • X is a superkey of R, or
  • Y is a subset of K for few key K of R

a.       there is no subset of a key is a key


Related Discussions:- Define the boyce-codd normal form

Explain the paths in the association network, Explain the paths in the asso...

Explain the paths in the association network We can analyze use of paths in the association network as given below: Calculate each operation Find associations whic

What is data dictionary, What is Data dictionary? A data dictionary is ...

What is Data dictionary? A data dictionary is a reserved space in a database that is employed to store information about the database itself. A data dictionary may consist o

What are the problems in database normalization, What are the problems if o...

What are the problems if one were not to normalize?  When do these problems surface?           Ans:  Database normalization, sometimes considered to as  canonical synthesis, is

Define tables students and teachers as sub tables of people, Write a query ...

Write a query to define tables students and teachers as sub tables of people? Create table students of student under people Create table teachers of teacher under people

What are advantages of object models, What are advantages of object models?...

What are advantages of object models? Object models are efficient for communicating with the application experts and reaching a consensus about the significant aspects of the p

What is the object-oriented decompositions, Object-oriented decompositions ...

Object-oriented decompositions Object-oriented decompositions of systems better are able to cope with change. Each subsystem has a well-defined interface which communicates with

Ddl compiler-database management system, DDL Compiler The DDL compile...

DDL Compiler The DDL compiler changes the data definition statements (such as CREATE TABLE .... in SQL) into a set of tables having metadata tables. These tables have infor

Define the concept of aggregation, Define the concept of aggregation.  Give...

Define the concept of aggregation.  Give two examples where this concept is useful. Ans: Aggregation transforms a relationship among the objects into a higher-level object. A

Define atomicity and aggregation, Atomicity : Either all functions are lai...

Atomicity : Either all functions are laid out or none are. Users could not have to think about the effect of incomplete operations. DBMS ensures this by undoing the functions

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd