The checksum is a very useful tool to verify the integrity of a file. There are several ways in which the contents of a file can be modified and become corrupt. This includes disk or RAM failure (hardware problem), CD-ROM reading error (medium problem), transfer error (modem), or human error.

Although Ruffin Scott, in TN 99-11 already describes the concept of a CRC checksum, the concepts may be difficult to understand and implement. The purpose of this tech note is to simplify CRC checksum and allow you to implement CRC without the need to understand how CRC works. The tech note includes all the code you need to implement CRC32 in your databases.

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