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Explain the concept of a data model ?
Data Model - Model is an abstraction procedure which hides irrelevant details although highlighting details relevant to the applications at hand. As same, a data model is a collection of concepts which can be used to elaborate structure of a database and gives the essential means to achieve this abstraction. Structure of database means the data types, relationships, and constraints which should hold for the data. In common a data model consists of two elements:
• A mathematical notation for expressing relationships and data.• Operations on the data which serve to express queries and other manipulations of the data.
What is deadlock? Neither of the transaction can ever proceed with its normal implementation. This situation is known as deadlock.
Question: a) Discuss the concept of data independence, explaining its importance in a database environment. b) To address the issue of data independence, the ANSI-SPARC t
object oriented database
What is average response time? The average response time is that the average time for a transaction to be done after it has been submitted.
complete er diagram of textile industry management
What are the benefits of OOA technology? Using OOA technology can produce many benefits, such as: i) Reusability of code ii) Productivity is gained through direct mappi
What is an index? An index is a structure that helps to place desired records of a relation quickly, without probing all records.
My cut off date is very soon in a Database subject and i dont know how to solve anything in it
Difference between Operating System and Database Security Security within the operating system can be executed at various levels ranging from passwords for access to system, t
Homework chapter 10 no 3
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