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Validating Canadian Postal Codes

By Ryan,

For fellow Canadians and neighbours to the south, you may find useful a function to validate the formatting of a Canadian postal code.  More than once I've had to work with web programmers on checking that a postal code meets the A1A1A1 style, so carry around a function that simply returns a true/false bit if a submitted varchar value does not meet our Canadian postal code standard.  I hope you find it useful!  Thanks to a colleague Patrick M. for quality checking this script.

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