Oracle Consulting Oracle Training Oracle Support Development
Oracle Books
SQL Server Books
IT Books
Job Interview Books
Rampant Horse Books
911 Series
Pedagogue Books

Oracle Software
Write for Rampant
Publish with Rampant
Rampant News
Rampant Authors
Rampant Staff
Oracle News
Oracle Forum
Oracle Tips
Articles by our Authors
Press Releases
SQL Server Books

Oracle 11g Books

Oracle tuning

Oracle training

Oracle support

Remote Oracle


Privacy Policy


  SQL Server Tips by Burleson


A hash is a function or algorithm, which takes a blob of data of an arbitrary length and produces a fixed length hash value. Many functions can take an arbitrary length of data and return a fixed length value but what distinguishes a Hash Function is that

Given the data, it is easy to calculate the hash value.

Given the hash value, it is difficult to calculate the message from which the hash value was calculated. This is why a Hash is also known as a one-way function.

Given a certain blob of data, which generates a specific hash value, it is difficult to find another blob that generates the same hash value.

Sometimes in certain applications, another feature of hashing is required. This is called ‘collision – resistance’ and means that it is hard to find two random blobs that generate the same hash.

Each hash implemented in this chapter uses the syntax “XP_AlgorithmName_HASH’

The above book excerpt is from:

Super SQL Server Systems
Turbocharge Database Performance with C++ External Procedures

ISBN: 0-9761573-2-2
Joseph Gama, P. J. Naughter  

Linux Oracle commands syntax poster

ION Oracle tuning software

Oracle data dictionary reference poster

Oracle Forum

BC Oracle consulting support training

BC remote Oracle DBA   



 Copyright © 1996 -2017 by Burleson. All rights reserved.

Oracle® is the registered trademark of Oracle Corporation. SQL Server® is the registered trademark of Microsoft Corporation. 
Many of the designations used by computer vendors to distinguish their products are claimed as Trademarks

Hit Counter