>>This query was working fine, but then all of a sudden it stopped pulling data. No errors, just empty results.
>>
>>

>>SELECT Salutation.Salutation, Valid_Numbers.[First Name], Valid_Numbers.[Last Name], Valid_Numbers.[House Number] & " " & [Street Name] AS Address, Valid_Numbers.City, Valid_Numbers.ST, Valid_Numbers.ZIP, Valid_Numbers.[Date of Birth]
>>FROM Salutation INNER JOIN Valid_Numbers ON Salutation.ID=Valid_Numbers.Salutation
>>WHERE switch(Len([date of birth])=7,Left([date of birth],2)=Month(Date()),Len([date of birth])=6,left([date of birth],1)=Month(Date()));
>>

>
>Are you using Access database? Have you tried running it in Access, not in VB? Also, have you checked if your tables still have data?
>
>Also, can you translate this complicated WHERE condition into English for me? What do you want to get?

What is the format of the data within the [date of birth] column? Whatever guesses that I can make about the format don't seem to match the logic given in the switch() function.