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Define DBA database administrator? DBA : A database administrator (DBA) is a person who is responsible for the environmental aspects of a database. In common, these involves:
What is substitutability? Any method of a class-say A can equally well be adjured with any object belonging to any subclasses B of A. This characteristic leads to code reuse, a
Types of Data fragmentation
external and internal mapping with examples
What is the use of Union and intersection operation? Union: The result of this operation contains all tuples that are either in r1 or in r2 or in both r1 and r2.Duplicate tuple
Our company hires independent contractors to install equipment at precise locations across North America. We want to track the installation data and generate reports. The compan
what is Lossless-join decomposition
Explain the steps for reduction of E-R model into relational model. Ans:(a) Entity set in E-R model will be considered as table name in relational Model. (b) Attributes of e
Question: AirwaysCentre, an international airline booking company currently uses a relational database system for their operations, which includes the following relations: P
what characterizes the levels in RAID technology
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