Question

I have a case statment (see below) but I always want to return a value even if nothing matches the WHERE clase. Is that possible? Thanks

SELECT 
    CASE 
        WHEN COUNT(*) > 10 THEN 1
        ELSE 0
    END
FROM 
fldt_QueryDSLAM lastDay
WHERE AccountID = @acc
    AND lastDay.DSL = @dsl
GROUP BY lastDay.DSL

Answer 1

You can wrap the select within an isnull;

SELECT ISNULL((
    SELECT 
        CASE 
            WHEN COUNT(*) > 10 THEN 1
            ELSE 0
        END
    FROM 
    fldt_QueryDSLAM lastDay
    WHERE AccountID = @acc
        AND lastDay.DSL = @dsl
    GROUP BY lastDay.DSL
), -99 /*no match*/)