ISL201 Short Notes for Final Term and Mid Term. Aslam u Alaikum dear students. If you are looking for ISL201 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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In Figure 1 we can clearly see where the mapping or connectivity is between different levels of database management System. Figure 1 shows another very important concept the internal layer and the physical layers lie separately on the physical layer is explicitly used to save data to disk and that’s it responsibility of the operating system.
DBMS has almost no worries with other physical level details than it passes on data together with the necessary instructions required for storage which data to the operating system. Figure-2 on the next page shows how data is displayed on different at the database architecture level as well as at the physical level.
We can clearly see that data storage at the physical level is in binary format and is separate from the internal view of the data in location and format. Separating the physical level from the inner level is very useful in terms of storage efficiency and data retrieval.Database Management System (CS403) VU © Copyright Virtual University of Pakistan 43
Fig: 2. Representation of data at different levels of the database
Architecture and on the physical level below
ISL201 Short Notes for Final Term and Mid Term
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