Mail Merge wildcards

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I have set up mailing labels through mail merge using MySql database by way of an ODBC connection. I can use the "standard filter" to print only the people I want, and even use the wildcard feature in all the text fields as in <name> <like> 'dun*' which will return all names beginning with "dun"

My problem is I want to find all people who have a birthday in a specific month. I cannot figure out how to do a partial filter for just the month. I have tried #04*# for the first 2 digits of the date field, but that returns an error.

I know this is possible, but I can't seem to find the solution.

Please Help !!