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Properties of a Transaction A transaction has four main properties. These are: Atomicity Consistency Isolation or Independence Durability or Permanen
Q. Define a weak entity set and its identifying relationship. List the necessary conditions for a meaningful identifying relationship set of a weak entity set. Entity is a t
How external/conceptual mapping and conceptual /internal mapping is performed
example of bank
1. Determine that the Checkpoints are a part of Ans: Checkpoints are a part of Recovery measures
Consider a table student (std_id, std_name, date_of_birth, percent_marks, dept_name). Write a QBE query to display names of Computer Science department students who have scored mo
The Proliferation of Object-Oriented Methods The first few years of the 1990s saw blossoming of around fifty various object oriented methods. This proliferation is a sign of g
What is NULL? Simply NULL means not in value.
#A multinational tour operator agency has gained new business growth in the North American market through the use of social media. Its operation has expanded by 50% within six mont
In case of entity integrity, the primary key may be declared? In a case of entity integrity primary key may be not Null.
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