Explain the two types of participation constraint, Database Management System

Assignment Help:

Explain the two types of participation constraint. 

Total: The participation of an entity set E in a relationship set R is said to be total if each entity in E participates in at least one relationship in R. 

Partial:  if only some entities in E participate in relationships in R, the participation of entity set E in relationship R is said to be partial.

 


Related Discussions:- Explain the two types of participation constraint

Triggers and Stored Procedures, 10A.53 Code an Oracle Database trigger to e...

10A.53 Code an Oracle Database trigger to enforce the constraint that an employee can never change his or her department. 10A.54 Code an Oracle Database trigger to allow the delet

What is rigorous two phase locking protocol, Differentiate strict two phase...

Differentiate strict two phase locking protocol and rigorous two phase locking protocol. In strict two phase locking protocol all exclusive mode locks taken by a transaction is

Explain the three data anomalies, What are the three data anomalies that ar...

What are the three data anomalies that are similarly to take place as a result of data redundancy?  Can data redundancy be completely eliminated in database approach?  Why or why n

Database administrator, The Database administrator (DBA) uses the data dict...

The Database administrator (DBA) uses the data dictionary in each phase of a database life cycle, beginning from the data gathering phase to the design, execution and maintenance p

Sorting field groups we cannot use more than one key field, While sorting f...

While sorting field groups we cannot use more than one key field False.

#title., losers with new information systems

losers with new information systems

Relational algebra operators, Question 1 Draw a Data Flow Diagram for a...

Question 1 Draw a Data Flow Diagram for a University scenario Question 2 Discuss the following with suitable examples Relational Algebra Operators Database Pla

Compare wait-die deadlock prevention with wait-wound scheme, Compare wait-d...

Compare wait-die deadlock prevention scheme with wait-wound scheme   Ans:  Wait-Die Scheme  a) Based upon a nonpreemptive technique.  b) If Pi requests a resource present

Relationship for college database, Using the concepts defined previous, we ...

Using the concepts defined previous, we have identified that strong entities in COLLEGE database are FACULTY, STUDENT, COURSE and DEPARTMENT. This database also has one weak entity

Cataloguing, differences between a classified catalog and a dictionary cata...

differences between a classified catalog and a dictionary catalog

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