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Explain the ANSI SPARC architecture The three-schema architecture is as well known as ANSI SPARC architecture. The aim of the three-schema architecture is to separate the user
write-set(T): Each data items that are written by a transaction T
What is the way a particular application views the data from the database that the application uses? Sub schema is the way a particular application views the data from the data
What is authorization graph? Passing of authorization from single user to another can be shown by an authorization graph.
3 assignments combined in 1
I need some help with my normalization database homework.
Question (a) Concurrent access to data from a database is a normal part of application program usage. Describe three approaches to concurrency control (b) Distinguish among
State the definition of association An association is a structural relationship which specifies that objects of one thing are connected with objects of another. In UML, asso
external and internal mapping with examples
Q. What is relational algebra and calculus? Explain the relational algebra operators :- Selection and predicate, set operation, joins and division. Sol. Relational Algebra
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