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OBJECTIVES
After going through this unit you should be capable to:
How many levels can be viewed in Architecture of the database ? Architecture of the database can be viewed as three levels.
Describe the objective of Structural Diagrams The main objective of structural diagram is to visualize, construct, specify and document static aspects of a system. Their eleme
Explain the functions of data manager? Functions of Data Manager : - Convert operations in user's queries coming directly through query processor or indirectly in an applicatio
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
The need for three level architecture The aim of the three level architecture is to divide each user's view of the database from the way the database is physically shown.
Design a gennalization and specialization hierarchy for an automobile sales company
A full discription of the new, a discription of its components, and the bebefit it will provide a company. A disscussion of the information usedin the system. A disscussion of any
Let us first look into some of the important features of ER model. Entity relationship model is a high-level conceptual data model. It permits us to define the data invo
what is Nested relational model? Explain with examples.
What is the used of specifying alias? Specifying alias: is used to rename column or attribute in a table.
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