Optional Arguments in WHERE Clause [duplicate]

Answer 1

Try something like this:

SELECT NAME 
FROM TABLE 
WHERE 
    City = IsNull(@City, City) AND
    Gender = IsNull(@Gender, Gender) AND
    Age = IsNull(@Age, Age)

OR:

SELECT NAME 
FROM TABLE 
WHERE 
    (City = @City OR @City IS NULL) AND
    (Gender = @Gender OR @Gender IS NULL) AND
    (Age = @Age OR @Age IS NULL)