Multi-valued attribute dbms, computer science, Basic Computer Science

Assignment Help:
Multi-valued Attribute DBMS
Each multi valued attribute maps into a separate table.
Include also an attribute for the primary key of the entity and relationship type which the attribute belongs to.
The relvar has an attribute for each simple attribute of the multi valued attribute.
This is also a foreign key.
The primary key of this relvar is the combination of all the attributes if the multi valued attribute is simple.
If the multi-valued attribute is composite, the primary key of this relvar may be a combination of some of the attributes.

Related Discussions:- Multi-valued attribute dbms, computer science

Designing computer based system-systems life cycle approach, Systems Life C...

Systems Life Cycle Approach Systems Analysis and Design follows a life cycle for development, as shown below. Brief discussion on this approach is given here: Figure

Create email account, Create Email Account: For sending or receiving e...

Create Email Account: For sending or receiving email, you need to have to an email account. The email account may be provided by the organization for which you are working or

Goals of autonomous rational agents, Goals of Autonomous Rational Agents: A...

Goals of Autonomous Rational Agents: Artificial intelligence One possible way to improve an agent's performance is to enable it to have some kind of details about what it is tr

Deadlocks, What is methods For handling Deadlocks?

What is methods For handling Deadlocks?

Outdoor patient department features - a doctor module, A Doctor Module ...

A Doctor Module Doctor has a list of the patients waiting for consultation. The doctor's module should include all the following details: Fields for common complaint

Database design, design railway maintenance system. draw er diagram.

design railway maintenance system. draw er diagram.

Types of search engine, Types of Search Engine:   Some of the basic ca...

Types of Search Engine:   Some of the basic categories of Search engines are :  a. Primary Search Engines: Such search engines use web crawlers or spiders to traverse the w

What is evaluating information system investments, 1. What is Evaluating In...

1. What is Evaluating Information System Investments? 2. Is IS evaluation different to evaluation of other investments? 3. What approaches are used to evaluate IS investments

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