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Describe Physical Data independence ?
Physical Data Independence - It is capacity to modify the internal schema without having to change conceptual schema. Therefore, the external schemas required not be changed as well. Changes to the internal schema might be required because some physical files had to be reorganized to improve the performance of retrieval or update. If the similar data as before remains in the database, the conceptual schema requires not be changed.
QUESTION (a) Using an appropriate example, explain what is a recursive function? (b) Explain in detail the C++ function given below. void search2(int list[],int n,int ele
Explain the Dynamic Hashing Techniques There are two methods in it: extendible hashing - stores an access structure in addition to the file, and therefore is somewhat identica
How can i turn a conceptual entity relationship diagram into a logical entity relationship diagram? what do i have to do with "mandetory or" and "optional or" relationships?
example of embedded SQL query
Consider the subsequent relations along with keys underlined Street (name, location, city) House (number, street_name) Lives (name, house_number) Define the above relations
Explain the Weak Entity Set An Entity set which does not have sufficient attribute to make a primay key is known as weak entity set. For instance, dependents of an employee in
List and also explain the dissimilar stages of DDLC ?
Describe Parameteric end users? Parametric end users might be given update access, but are commonly not permitted to change the structure of data.
er diagram of sport
The issues relating to the Design of the Physical Database Files Physical File is a file as stored on the disk. The major issues relating to physical files are: • Cons
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