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The External or View Level
The external or view level is the highest level of abstraction of database. It gives a window on the conceptual view, which permits the user to see only the data of interest to them. The user can be either an end user or an application program. There can be a lot of external views as any number of external schemas can be defined and they can overlap each other. It contains of the definition of logical records and relationships in the external view. It also has the methods for deriving the objects such as attributes, entities and relationships in the external view from the Conceptual view.
Logical DBMS Architecture
What type of view of total database content? Data base content Conceptual view of total database contain.
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i need to implememnt a treee based mining algorithm. do you have an expert that can do that?
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What is the max. no. Of structures that can be included in a table or structure. Nine.
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