Relational constraints, Database Management System

Relational and E-R Model

There are three types of constraints on relational database that have:

  • DOMAIN CONSTRAINT
  • PRIMARY KEY CONSTRAINT
  • INTEGRITY CONSTRAINT

 

Posted Date: 3/6/2013 5:24:54 AM | Location : United States







Related Discussions:- Relational constraints, Assignment Help, Ask Question on Relational constraints, Get Answer, Expert's Help, Relational constraints Discussions

Write discussion on Relational constraints
Your posts are moderated
Related Questions
Company XYZ is an advertising company. It has its own website but the search facilities offered are not reliable. The company is willing to invest to acquire new machines and sof

please i request for your assistance in developing a case-based online phone repair

How is concurrency identified? Concurrency in objects can be identified by the way they alter their state. Current objects can change their state independently. Aggregation imp

Domain Constraints Domain constraints are primarily formed for defining the logically correct values for an attribute of a relation. The relation allows attributes of a relatio

examples of fields in a database

How does the system cope up with a record crash when recovery is going on after the first crash? Ans:  In a system the undo and redo operations are needed to be idempotent to c

What is Conceptual Schema? Conceptual Schema - Conceptual schema elaborates the structure of the overall database for a community of users. It hides the details of physical sto

The Internal or Physical Level The collection of files permanently stored on secondary storage devices is called as the physical database. The internal or physical level is t

What is Multivalued Attribute? Multivalued Attribute - Multivalued attribute might have more than one value for an entity. For instance, PreviousDegrees of a STUDENT.

Project: Microsoft Access You have been asked by the ABC Tanning Salon to create a database that can be used to track the salon's customers.  You are to create a table in Access