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  #1  
Old 09-12-2008, 09:24 AM
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Ruby17 Ruby17 is offline
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Arrow Logical and physical view of DBMS.

Logical view and physical view



A database management system provides the ability for many different users to share data and process resources. But as there can be many different users, there are many different database needs. The question now is: How can a single, unified database meet the differing requirement of so many users?

A DBMS minimizes these problems by providing two views of the database data: a physical view and a logical view.

THE PHYSICAL VIEW OF DBMS

The physical view deals with the actual, physical arrangement and location of data in the direct access storage devices(DASDs). Database specialists use the physical view to make efficient use of storage and processing resources. Users, however, may wish to see data differently from how they are stored, and they do not want to know all the technical details of physical storage. After all, a business user is primarily interested in using the information, not in how it is stored.
THE LOGICAL VIEW OF DBMS

The logical view/userís view, of a database program represents data in a format that is meaningful to a user and to the software programs that process those data. That is, the logical view tells the user, in user terms, what is in the database. One strength of a DBMS is that while there is only one physical view of the data, there can be an endless number of different logical views. This feature allows users to see database information in a more business-related way rather than from a technical, processing viewpoint. Thus the logical view refers to the way user views data, and the physical view to the way the data are physically stored and processed...

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Old 11-13-2008, 04:12 PM
trinitybrown trinitybrown is offline
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Very good article and really informative, can you explore it more or either tell me link of this article
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Old 12-24-2008, 03:26 PM
Jenniferlinn Jenniferlinn is offline
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Thanks for the post, I must say it's really very good article, keep posting
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Old 12-16-2009, 11:47 AM
emily123 emily123 is offline
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Hello
I agree with tremayne. Posting parts of wikipedia articles have absolutely no interest. We are only interested by your thoughts about this. For instance do you understand the differences between physical and logical view ? For instance, are you ready to tell your boss he must buy a very expensive RDBMS manager because it is able to create a materialized view of a complex external join whereas his current database manager cannot ?

Thanks.
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Old 10-06-2015, 10:38 AM
sonia sharma sonia sharma is offline
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Very nice and useful information. Thank you for sharing...
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