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What is a hash index?
A hash index organizes the search keys, with their associated pointers, into a hash file structure.
Eliminate Repeating Groups The problem is, "Find out the list of employees, who knows DB2". For this problem we require to perform an awkward scan of the list looking for re
NEED FOR A DATABASE MANAGEMENT SYSTEM A Database is a structured, persistent collection of data of an organisation. The database management system (DBMS) manages the database o
Discuss deferred update technique of recovery. What are the advantages? Ans: The deferred update methods do not physically update the database on disk till after a transact
#question. acompani datdbase needs to store information about employees (identified by a social security number,with salary and phone as attributes) and departments (identified by
Data Replication "If a relation R has its copies kept at two or more sites, then it is considered replicated". But why do we replicate a relation? There are several advan
HOW MANY TYPES OF VIEWS
Explanation on Data Sharing?
1. Which model is used to store data in tree structures Ans: Hierarchical model is used to store data in tree structures
What are the properties in a relation ? In a relation Ordering of rows is immaterial and No two rows are identical.
What is Message switching Message switching transmits data units which can be arbitrarily long. Packet switching has a utmost packet size, if any message longer than that, it s
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