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Calculating checksum in datawarehousing

Checksum is a calculated value that is used to determine the integrity of data. Checksum serves as a unique identifier for the data (a file, a text string, or a table row). If the data changes then so does the checksum value. This makes it easy to verify the integrity of the data.

Checksum is very useful in data warehousing especially when working with very wide slow changing dimensions. It takes less processing power to compare one checksum field than to compare all fields within dimension.

dbSL ETL software can calculate check sum for entire file, string or row of data. it supports following algorithms CRC16, CRC24, CRC32, Adler32, CRC64, eDonkey, eMule, MD4, MD5, RIPEMD160, SHA1, SHA224, SHA256, SHA384, SHA512,Whirlpool. It can return the data in HEX or BASE64 format.

Calculating checksum

"Because of our relationship with DBSL, We are able to provide more complete solutions for our customers. As one of our key technology partners, DBSL is always willing to go that extra mile: adding new functionality, assisting us with support issues ... and this has been an important part of our success."

Bill Dill,
Deployment Manager

Our customers

BP

BBC

HSBC

Orange

CAT

SEPA
emc
NHS
Australian Rugby Union
xerox
Databases we work with