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mapping, Database Management System
external and internal mapping with examples
Posted Date: 3/19/2013 11:48:43 AM | Location : USA
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What is the object-oriented decompositions, Object-oriented decompositions ...
Object-oriented decompositions Object-oriented decompositions of systems better are able to cope with change. Each subsystem has a well-defined interface which communicates with
Failures and recovery, Failures and Recovery In practice various things...
Failures and Recovery In practice various things might occur to prevent a transaction from completing. Recovery methods are used to bring database, which does not satisfy consi
What are the overlapping elements, What are the Overlapping elements O...
What are the Overlapping elements Overlapping elements can be found by scanning all the elements in front of deleted element in priority list for the sheet and comparing them
Example of relational operations, Consider the relation PERSON. If you want...
Consider the relation PERSON. If you want to display details of persons having age less than or equal to 30 than the select operation will be used as follows: σ AGE The resu
Which are two ways that entities participate relationship, Which are the tw...
Which are the two ways in which entities can participate in a relationship? Total and partial are the two ways in which entities can participate in a relationship
What is an index, What is an index? An index is a structure that helps ...
What is an index? An index is a structure that helps to place desired records of a relation quickly, without probing all records.
List the table modification commands in sql, List the table modification co...
List the table modification commands in SQL? A) Deletion B) Updates C) Insertion D) Update of a view
How to control as concurrent tasks, Control as Concurrent Tasks The ex...
Control as Concurrent Tasks The expression control as simultaneous task means applying control for those events of object which can happen simultaneously. An object can be imp
How many block accesses average saved on using secondryindex, Normal 0 ...
Normal 0 false false false EN-US X-NONE X-NONE
Write a short note on oracle instance, Write a short note on oracle Instanc...
Write a short note on oracle Instance? Oracle Instances: An instance is the (executed) Oracle software and the memory they use. It is the instance which manipulates the data s
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