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What is object containment?
References among objects can be used to model dissimilar real-world concepts.
Which database level is closest to the users? External database level is closest to the users.
What is meant by data-transfer rate? The data-transfer rate is the rate at which data can be retrieved from or kept to the disk.
comparison of oracle RDBMS with MySQL
Which are the two ways in which entities can participate in a relationship? Total and partial are the two ways in which entities can participate in a relationship
One-way Associations If an association is only traversed in single direction, then it is known as one-way association. It is implemented as a pointer or an attribute which con
how to submit answers softcopy
Define Atom of domain relational calculus An atom has the outline 1 , x 2 , ... , x n > -> r , in which r stands for a relation on n attributes and x 1 , x 2 , ... , x n ar
How can you map NULL values to other values while display? IF( ) , IFNULL( ) keywords are used to do so. They are 'LIMIT' is used for the following kinds of problems: 1) Ans
What is Foreign Key Foreign Key: Sometimes we may have to work with an attribute that does not have a primary key of its own. To recognize its rows, we have to use the primar
Distributed Database Management System
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