I've been asked about counting NULL values several times so I'm going to blog about it in hopes others will be helped by this explanation of NULL values in SQL and how to COUNT them when necessary. Note, my examples make use of a table found in the System Center Configuration Manager database.
I totally NULL what you are talking about now. Thanks for teaching us Admins some SQL skills.
It is much better to use Oracle SQL Singel-row General function NVL, who convert null to actual value.
SELECT COUNT(NVL( , 0))
Something with comments filter...
SELECT COUNT( NVL( column, 0 ) )
WHERE column IS NULL;