Question

Writing a stored procedure that will have multiple input parameters. The parameters may not always have values and could be empty. But since the possibility exists that each parameter may contain values I have to include the criterion that utilizing those parameters in the query.

My query looks something like this:

SELECT DISTINCT COUNT(*) AS SRM
FROM table p
WHERE p.gender IN (SELECT * FROM Fn_SplitParms(@gender)) AND 
p.ethnicity IN (SELECT * FROM Fn_SplitParms(@race)) AND 
p.marital_status IN (SELECT * FROM Fn_SplitParms(@maritalstatus)) 

So my problem is if @gender is empty(‘ ‘) the query will return data where gender field is empty when I really want to just ignore p.gender all together. I don’t want to have to accomplish this task using IF/ELSE conditional statements because they would be too numerous.

Is there any way to use CASE with IN for this scenario? OR
Is there other logic that I’m just not comprehending that will solve this?

Having trouble finding something that works well…

Thanks!

Answer 1

Use or:

SELECT DISTINCT COUNT(*) AS SRM
FROM table p
WHERE 
(p.gender IN (SELECT * FROM Fn_SplitParms(@gender)) OR @gender = '')
AND (p.ethnicity IN (SELECT * FROM Fn_SplitParms(@race)) OR @race = '')
AND (p.marital_status IN (SELECT * FROM Fn_SplitParms(@maritalstatus)) OR @maritalstatus = '')