I just discoverd something I was not aware. The _ character is used as a filtering character, such as a wild card, when doing a query. The following:

DECLARE @LXListFirstName Varchar(16)

SET @LXListFirstName='S_SH%'

SELECT Member.Numero
 FROM Member
 WHERE UPPER(Member.FirstName) LIKE @LXListFirstName
 ORDER BY Member.LastName,Member.FirstName 

...will find all records having S as the first character and SH for the 3rd and 4th character no matter what is the second letter. So, it found results such as:

Sushil
Sasha
Sushma
Sushell
Sushi

How can I turn that OFF? Basically, I really needed to find S_Sh as is and not all those records.