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Explain what is Aggregation ?
Aggregation: This is used whenever we intend to show a relationship between an entity and the relationship. There is no provision for this in the ER Model. This is shown by placing the relationship between two entities along with the entities in a box and setting up a relationship between this box and another entity.
Explain the main advantages of DBMS over File Oriented System ?
(a) Differentiate between information and data . (b) List and briefly explain five potential benefits of the database approach compared to conventional file systems. (c) Diff
What are the Overlapping elements Overlapping elements can be found by scanning all the elements in front of deleted element in priority list for the sheet and comparing them
What is an Operand? The data on which the operation is to be performed is known as an Operand
What is multiple relationship ?
give me a diagram about physical or internal level
What are the reasons for having variable length records? What are the various ways to store variable length records? Variable-length records arise in a database in various wa
Text Processing: Use readLines to read SOU.txt into R. Create a vector called Pres containing the names of the presidents giving each speech. To do this, rst identify the lin
what problems are raised by the database? why is it so controversial? why is data quality an issue?
#what is cursor its uses ? Explain it
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