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Explain I command in QBE ?
I : It is the command in QBE that is used to insert tuple (s) into the database
why older data models are being replaced by new data models.
multidimensional data model
Which method is used to key transformation ? A hash method is used to key transformation.
Question: (a) Can a set of data requirements be correctly modelled by two or more different ER diagrams? Explain your answer. You may use a small example, if you think it will
What is transaction? Collections of operations that form a single logical unit of work are known as transactions.
Consistency error : These errors happen due to the inconsistent state of database caused may be due to wrong implementation of commands or in case of a transaction abort. To overc
What is an ER diagram? Why is it used in Database management system (DBMS)?
Describe analysis of access paths To describe analysis of access paths, consider an example of the design of a company's employee skills database. A part of the object model fr
entity relationship diagram about finance
These are designed to reduce the effects of a database failure and make sure a database is restored to a consistent state if a failure does arise. Manual backup/restore utilities n
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