data fregmentation, Database Management System

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why we fregment at all?

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Ways to suggest the dba, a)  Suppose we updated the catalog tables in real ...

a)  Suppose we updated the catalog tables in real time, that is, after every update, insert, or delete SQL statement were executed-rather than only running RUNSTATS once every few

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What is called a query evaluation plan? A sequence of primitive operations that can be used to assess a query is a query evaluation plan or a query implementation plan.

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How many levels can be viewed in Architecture of the database ? Architecture of the database can be viewed as three levels.

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What is a primary key? Primary key is chosen by the database designer as the principal means of identifying an entity in the entity set.

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Association as a cache This association must be updated when any new element is added to it, but testing for overlap using association is more efficient.    Figure:

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Question 1 Suppose the employee employee id, name, designation, salary, attendance and address of any employee has to be stored in a database. You can store these data in a sequen

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While sorting field groups we cannot use more than one key field False.

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Explain Composite attribute in SQL ? Composite attribute: A composite attribute has many components, each of that is atomic or composite.

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