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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 is aggregate function? Briefly describe it? Aggregate functions are functions that take a collection of values as input and return a one value. SQL offers 5 built-in aggre
Fourth Normal Form (4NF) When attributes in a relation have multi-valued dependency, further Normalization to 4NF and 5NF are needed. Let us first find out what multi-valued d
define normalisation and functional dependency
What function divides one numeric expression by another and returns the remainder? MOD function divides one numeric expression by another and returns the remainder.
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
State the meaning of Object Representation The term object representation means "to represent object with the help of objects model symbols". Implementing objects is too simp
Which method of access uses key transformation? A Hash method of access uses key transformation.
How do you find the final model after iterative analysis? Why is iterative analysis of any of the problem needed? The final model serves as the base for system architectur
What are the different approaches for database design? There are two basic approaches for database design which are as follows: Attribute driven: It compiles a list of att
how to prepare a data dictionary for online examination system for certified courses?
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