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Problem
1 What is a Data Warehouse? Mention its advantages
2 Explain the Top-Down and Bottom-up Data Warehouse development Methodologies
3 What is Data Transformation? Explain the tasks involved in it
4 Why are the operational system keys not recommended for forming data warehouse primary keys? Give any two examples
What are the three classes of SQL expression? SQL expression consists of three clauses: Select From Where
Critically explained the benefits and limitations of different database technologies with proper examples
wh
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Can a filed occur in several field groups. Yes. But it leads to redundant data redundancy.
Question (a) Visual Basic is governed by an event processor. Explain the meaning of this phrase. (b) Differentiate between an general procedure and event procedure. (c)
Where does view definition stored? A view definition is permanently stored as part of the database.
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
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External failure : A failure can also result because of an external cause, such as earthquakes, fire, floods, etc. The database must be duly backed up to avoid troubles occurring d
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