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How persistent programming languages differ from traditional programming languages?
Database languages vary from traditional programming languages in that they directly manipulate data that are persistent-that is, data that carry on to exist even after the program terminated. Relation in a database and tuples in a relation are instance of persistent data. In contrast, the only persistent data that traditional programming languages directly manipulate are files.
How is the database organised in Oracle? Database organized within Oracle in terms of table and table holds attributes and values. A database consists of one or more logical
What is called an evaluation primitive? A relational algebra operation annotated with instructions on how to evaluate is known as an evaluation primitive.
What is transaction? Transaction is a unit of program implementation that accesses and possibly updated several data items.
The primary key is selected from the
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Determine the Other System Design Issue How to realise subsystems; through hardware or software? How is object model mapped on chosen hardware software? Mapping
What are the various states through which a transaction passes through in its lifetime? Briefly discuss all the events that causes transition from one state to another. Ans:
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State as Location within a Program In this traditional approach, location of control inside a program totally defines the program state. Any finite state machine may be implem
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