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Explain hash file organization?
Hash functions
a) The distribution is uniform
Hash functions assign each bucket the similar number of search -key values from the set of all possible search-key values
b) The distributed in random
In the average case every bucket will have nearly same no of values assigned to it, regardless of the actual distribution of search-key values
Handling of bucket overflows
o Insufficient buckets
o Skew
Open hashing
Under an alternative approach known as open hashing
Close hashing
The form of hash structure that we have just explained is something referred to as close hashing.
Hash indices
A well-maintained relational DBMS has a high level of data integrity. What features of a relational DBMS contribute towards this level of integrity? Relational DBMS gives high
1. Determine the set of minimal functional dependencies for the following data. The local bakery, Happy Cakes, needs your help designing a database that will support a kiosk in
random file sharing
A relation instance indicates as r is a collection of tuples for a given relational schema at a exact point of time. A relation state r of the relation schema R (A 1 ,A 2 ,.....
Develop C# schoolproject ASAP Helping me with schoolproject. The project is prepared in C# and haves a database connection. We have some small issues asking up data from t
Control as Concurrent Tasks The expression control as simultaneous task means applying control for those events of object which can happen simultaneously. An object can be imp
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List the Armstrong's axioms for functional dependencies. What do you understand by soundness and completeness of these axioms? Ans: The Armstrong's axioms are: F1:
how many hourse have been spent on a certain project
What is DDL? Make a list of commands with short description used in DDL Ans: Data Definition Language that is abbreviated as DDL is a computer language for defining data struct
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