Question

I have the following query:

SELECT  frst.FirstActionPath, scnd.SecondActionPath, frst.FirstIterationId, scnd.SecondIterationId, 
        frst.FirstTestRunId, scnd.SecondTestRunId, frst.FirstOrderId, scnd.SecondOrderId
FROM    @FirstRunData frst 
        FULL JOIN @SecondRunData scnd 
            ON frst.FirstIterationId = scnd.SecondIterationId
            AND frst.FirstActionPath = scnd.SecondActionPath

ORDER BY scnd.SecondIterationId, scnd.SecondOrderId, frst.FirstIterationID, frst.FirstOrderId

It gives me the following results:

The top row is a row that is in the @FirstRunData table but has not matching row in the @SecondRunData row.

How can I change my order by so that the extra row will be after the row with the 10000 value in FirstOrderId?

Answer 1

You might be able to take advantage of COALESCE in your ORDER BY clause. For example,

ORDER BY COALESCE(scnd.SecondIterationId, frst.FirstIterationID, 9999),
COALESCE(scnd.SecondOrderId, frst.FirstOrderId, 9999),
frst.FirstIterationID, frst.FirstOrderId

Something like this my address your example, but you’ll need to alter it based on your requirements for all conditions.