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Data Fragmentation
"Fragmentation includes decomposing the data in relation to non-overlapping component relations".
Why do we require fragmenting a relation?
Define data model? A data model is a collection of conceptual tools for explaining data, data relationships, data semantics and consistency constraints.
What is the most significant feature that does not directly map into programming language structures? Why? Association, since there are complex types of association, like as qu
How many levels can be viewed in Architecture of the database ? Architecture of the database can be viewed as three levels.
(a) Why did SAP introduce the extended star schema?
Describe the various types of Online Analytical Processing (OLAP) tools and briefly discuss how the support common analytical operations.
Explain degree of relation? Degree of a Relation - The degree or arity of a relation is the number of attributes n of its relation schema.
Define Join and Outer Join and differentiate between them. Ans: Join - It generates all the combinations of tuples from two relations which satisfy a join condition. Oute
design a generalization specialization hierarchy for a motor vehicle sales company. the company sells motorcycles, passenger cars, vens and buses.
When a function module is activated syntax checking is performed automatically. YEs, a function module is activated syntax checking.
Hierarchical model is also known by? A hierarchical model is also known as a Tree structure.
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