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Three Level Architecture of DBMS or Logical DBMS Architecture
The logical architecture defines how data in the database is perceived by users. It is not deals with how the data is handled and processed by the DBMS, but only with how it looks. The process of data storage on the underlying file system is not revealed, and the users can influence the data without worrying about where it is located or how it is really stored. This results in the database having dissimilar levels of abstraction.
The majority of commercial Database Management Systems available today are based on the SPARC / ANSI generalised DBMS architecture, as proposed by the SPARC / ANSI Study Group on Data Base Management Systems. Therefore, this is also called as the SPARC / ANSI model. It separates the system into three levels of abstraction: the physical or internal level, the conceptual level, and the view or external level.
Define the Third Normal Form: The third normal form (3NF) is a normal form employed in database normalization. 3NF was initially defined by E.F. Codd in 1971. Codd's definitio
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what do you mean by primary key constraint?
Define an operator that a Relational Algebra does not have Ans: Relational Algebra does not have Aggregation operators.
Design a gennalization and specialization hierarchy for an automobile sales company
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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.
A Distributed Transaction Let us demonstrate the concept of a distributed transaction by considering a banking system having of three branches located in 3 different cities. Ev
Define a job scheduling strategy that will meet business requirement of reporting availability by 6am CST for the following cubes? Show the job scheduling dependencies in a pictori
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