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What is transaction?
Transaction is a unit of program implementation that accesses and possibly updated several data items.
#question.ERD of any car
Define the notation for classes and atrributes The notation for class, attribute, and operations are shown below: Figure: Class with attributes and operations A
what problems are raised by the database? why is it so controversial? why is data quality an issue?
discuss the purpose of the concurrency control?
Serialisable Schedules: If the processes of two transactions conflict with each other, how to verify that no concurrency related problems have happened? For this, serialisability t
can you create a database for me in oracle/sql
What is an Operand? The data on which the operation is to be performed is known as an Operand
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
#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
Write the motivations led to development of OO-DBMS? 1. Programmer frustration with RDBMSs. 2. Requirement for special features.
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