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What is object identity?
An object retains its identity even if some or all the values of variables or explanations of methods change overtime.
compare the features of oracle RDBMS with MySQL and Microsoft SQL server
What is a hash index? A hash index organizes the search keys, with their associated pointers, into a hash file structure.
What is Normalization? Database normalization is a data design and organization method applied to data structures based on rules that help building relational databases. In rel
I need help with some assignments
Assignment #1 Data Management The questions on this exam are based on the Baxter Aviation case scenario. 1. (5 points) The systems analyst proposes the following two relationshi
Objectives Define the terms RECOVERY and INTEGRITY; Define Recovery Techniques; Explain Error and Error detection techniques, and Define types of Authorisation.
Prove that a relation which is 4NF must be BCNF. Ans Let R be in 4NF. Suppose it is not in BCNF. Hence, there exists an FD X→Y in R such that x is not a super key. Although
How persistent programming languages differ from traditional programming languages? Database languages vary from traditional programming languages in that they directly manipul
Define raid? Briefly explain it? A range of disk organization methods, collectively called redundant arrays of independent disks (RAID) o Improvement of reliability throug
What is assertion? Mention the forms available. An assertion is a predicate expressing a condition that we wish the database always to satisfy. Domain integrity constraints.
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