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Casting varchar as int

Last Modified: 2011-10-19
Hi Experts!

I have to create a search query for various fields.  The search string is type varchar and all of the fields in a table are varchars of different lengths.  The problem is two fields FEIN and ERN store mostly numeric data.  I cannot change the data types and I have tried to cast the varchar as an int in my where clause but I get an error.   An example of a FEIN could either be 11-1111111 or 111111111.  ERN are always 7 digits. Can anyone assist me?
Miracle by Design
WHERE ((Cast(FEIN as int)) = cast(@Criteria as int) and a.JTAppID is not null)

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