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What are the properties in a relation ?
In a relation Ordering of rows is immaterial and No two rows are identical.
Increases efficiency : Data is stored close to most often used site, therefore retrieval would be faster. Also, data that is not required by local applications is not stored, there
What is the used of specifying alias? Specifying alias: is used to rename column or attribute in a table.
Define access time. Access time is the time from when a read or write request is issued to when data transfer starts.
A set of possible data values is called? A set of possible data values is called as domain.
Example - ALTER TABLE emp MODIFY (empno NUMBER (7));
What are advantages of object models? Object models are efficient for communicating with the application experts and reaching a consensus about the significant aspects of the p
Need for Client Server Computing- Client/Server (C/S) architecture includes running the application on multiple machines in which every machine with its component software tackles
what is cascading rollback
waht is a repeating group?
In E-R Diagram how derived attribute are represented ? In E-R Diagram By Dashed ellipse derived attribute are represented.
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