Proper Luhn AddCheckDigit for any length #

By Bruce D. Rempe, 2006/01/12

Most of the luhn scripts assume that you are working with credit-cards and then IMPROPERLY calculate their luhn check-digit by starting at the left side (assuming that the core number is always 15 digits). However, if you don't know the length of your core number, then such an approach will fail when the length is even. This function will work without regard to the length of the core number because it properly starts it's calculations from the right side of the number.

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FORUM

Record Length

Record Length of a Float data type

FORUM

Using a parameter for substring length

Creating and using a parameter for substring length

FORUM

Values from variable length flat files

using values from variable length flat file in multiple rows

FORUM

maximum length of Dimension Attribute

FORUM

export fixed-length flat file

fixed length with line feed

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Proper Luhn AddCheckDigit for any length #

Record Length

Using a parameter for substring length

Values from variable length flat files

maximum length of Dimension Attribute

export fixed-length flat file

Join the most active online SQL Server Community

SQL knowledge, delivered daily, free:

You make SSC a better place

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