What is the purpose of hash databases such as NSLR?

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
Section: Chapter Questions
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What is the purpose of hash databases such as NSLR?

 

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Hashing is the most common way of changing any given key or a series of characters into another worth. This is generally addressed by a more limited, fixed-length worth or key that addresses and makes it simpler to find or utilize the first string.

 

The most famous use for hashing is the execution of hash tables. A hash table stores key and worth matches in a rundown that is open through its list. Since key and worth matches are limitless, the hash capability will plan the keys to the table size. A hash esteem then turns into the list for a particular component.

 

A hash capability produces new qualities as per a numerical hashing calculation, known as a hash esteem or just a hash. To forestall the change of hash once more into the first key, a decent hash generally utilizes a one-way hashing calculation.

 

Hashing is pertinent to yet not restricted to data ordering and recovery, computerized marks, online protection and cryptography.

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