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entity relationship diagram for online examination system
Data Warehousing & Mining 1. What is the concept of knowledge discovery in database? 2. Describe the following types of Multidimensional Data Models. • Stars, Snowflakes and
a method named WonGame that checks each letter in the word is matched by its label
A customer places orders for parts and belongs to a particular industry group. An individual order is taken by a particular sales representative on a specific date and the sales re
Load sample data into the database tables design and test queries to return the following information • All rows and columns for employees • All rows and columns for customers •
Drawbacks of Database systems ?
Explain the rules for creating a labelled precedence graph for testing view serializability. Ans: A schedule S is view serializable if it is view equivalent to a ser
Create 1 experiment to demonstrate an aspect of query optimisation by using access-path structures (indexes), decomposition, or denormalisation. Once satisfied with your experiment
In case of entity integrity, the primary key may be declared? In a case of entity integrity primary key may be not Null.
How can i turn a conceptual entity relationship diagram into a logical entity relationship diagram? what do i have to do with "mandetory or" and "optional or" relationships?
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