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Explain the rules for creating a labelled precedence graph for testing view serializability.
Ans: A schedule S is view serializable if it is view equivalent to a serial schedule
Testing for Serializability
Suppose R is a relation with attributes A1, A2,..., An. As a function of n, tell how many superkeys R has, if: 1.1 The only key is A1. 1.2 The only key is A1 and A2. 1.3 The o
Define an abstraction by which relationships are treated as higher level entities Ans: Aggregation. It is an abstraction by which relationships are treated as higher level
Explain in details about Data Sharing
What is OMR? OMR (Optical Mark Recognition) is the translation of marks - or the absence of marks - but not the shape of the mark on forms that have small circles ("also called
describe objectivde of file organisation
Objectives Define the terms RECOVERY and INTEGRITY; Define Recovery Techniques; Explain Error and Error detection techniques, and Define types of Authorisation.
In which form of relational database developer refers to a record? In a tuple form of relational database developer refers to a record.
Explain in details about the f unctions of DBA ?
Define null values. In some cases a certain entity may not have an applicable value for an attribute or if we do not know the value of an attribute for a certain entity. In the
I have been given 8 differebt data warehouseing failure case studies. I need to question 4 questions for each
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