Oracle: How to count null and non-null rows

Question

I have a table with two columns that might be null (as well as some other columns). I would like to count how many rows that have column a, b, both and neither colu

Answer 1

This worked well for me for counting getting the total count for blank cells on a group of columns in a table in oracle: I added the trim to count empty spaces as null

SELECT (sum(case 
           when trim(a) is null Then 1
           else 0
       end)) +
   (sum(case
           when trim(b) is null 
           else 0
       end)) +
   (sum(case
           when trim(c) is null 
           else 0
       end)) as NullCount
FROM your_table

Hope this helps

Cheers.