ENG503 Short Notes for Final Term and Mid Term

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ENG503 Short Notes for Final Term and Mid Term . Aslam u Alaikum dear students. If you are looking for ENG503 Short Notes for Final Term and Mid Term file? Then you are visiting the right website. I provided the perfect solution here according to my efforts. If there is any mistake then please correct it before submitting the VULMS account and before midterm and final term exams preparation .Thanks

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ENG503 Short Notes for Final Term and Mid Term
ENG503 Short Notes for Final Term and Mid Term

 

As in the previous example, we have seen how two database users access the database and we saw that both have completely different user views. Here when we see in the logical view of the data we can see that the data stored in the the database is stored only once and two users get different data from the same
a copy of the data at a basic conceptual level.

Giant. 3: External and conceptual layers To sum it all up, we can say that the external view is the view of the database a system in which users get data as they need it, and those database users need Database  Management System (CS403) VU © Copyright Virtual University of Pakistan 39
don’t worry about the basic details of the data, all these users have to do is provide the database administrator or database designer with the correct information about the requirements
anyone designing a database for a system to DBA.

A database designer can create a database in such a way that it can meet user requirements using a  conceptual database diagram. A conceptual view/schema is an all-encompassing view of the database
database system and provides the basis for creating any type required user views and can accommodate any user that meets his/her requirements.

Exercises:
The data examples you defined in the exercises from lecture 1, think about it various forms of data at an external and conceptual level. Also try to define mapping between them.

ENG503 Short Notes for Final Term and Mid Term