Question

Here is my query:

SELECT 
    CONCAT( YEAR( prm.fromdt ) , '|', MONTH( prm.fromdt ) ) AS k, 
    CONCAT( YEAR( prm.fromdt ) , ' - ', MONTH( prm.fromdt ) ) AS v,
FROM prm
GROUP BY k
ORDER BY `k` DESC

Which returns:

K       V
2009|7  2009 - 7
2009|6  2009 - 6
NULL    NULL

Is there a way Instead NULL NULL to get how many nulls I have? Something like

K       V
2009|7  2009 - 7
2009|6  2009 - 6
Nulls   6

Answer 1

You could do this:

SELECT CONCAT( YEAR( prm.fromdt ) , '|', MONTH( prm.fromdt ) ) AS k, 
       coalesce(CONCAT( YEAR( prm.fromdt ) , ' - ', MONTH( prm.fromdt ) ), cast(count(*) as varchar(255)) AS v   
FROM prm
GROUP BY k
ORDER BY `k` DESC

I don’t like mixing data of different types in one column. However, this might meet your needs.