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OBJECTIVES
After going through this unit you should be capable to:
What are the various properties of Relational tables? Relational tables have 6 properties: 1. Each row is unique. 2. Column values are of the same kind. 3. Values are
Define data model? A data model is a collection of conceptual tools for explaining data, data relationships, data semantics and consistency constraints.
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
Define an operator that a Relational Algebra does not have Ans: Relational Algebra does not have Aggregation operators.
In this practical assignment, we will run through a complete database application development cycle, starting with the schema design, from an initial data import to database applic
What is Multivalued Attribute? Multivalued Attribute - Multivalued attribute might have more than one value for an entity. For instance, PreviousDegrees of a STUDENT.
What are the several forms of identity? a) Value b) Name c) Built-in
Explain how you can define an object model of a system. A list of terms that shall be used by end users to describe state and behaviour of objects in system. Different use
Explain the conventions (relationships) for displaying an ER schema as an ER diagram.
courier company er-diagram
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