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Consider the relations given below Borrower (id_no, name) Book (accno., title, author, borrower_idno) (a) Define the above relations as tables in SQL forming real world assumptio
What subschema expresses ? A subschema expresses the external view. (External schemas are called also called as subschemas)
Prove that a relation which is 4NF must be BCNF. Ans Let R be in 4NF. Suppose it is not in BCNF. Hence, there exists an FD X→Y in R such that x is not a super key. Although
What is multiple relationship ?
The physical location of a record is determined by which mathematical formula that transforms a file key into a record location? The physical location of a record is determined
How persistent programming languages differ from traditional programming languages? Database languages vary from traditional programming languages in that they directly manipul
explain concept of decomposition?
Mixed fragmentation: Sometimes, horizontal fragmentation or vertical fragmentation of a database schema by itself is insufficient to sufficiently distribute the data for some appli
Define deadlock avoidance. An alternative method for avoiding deadlocks is to needs additional information about how resources are to be requested. Each request requires the s
deffine class&object
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