How do I count the number of zeros in sql?

Question

I have a column that has a value that is either 0 or 1. how do i count the numbers of zeros?

SELECT A.id
FROM table1 A
GROUP BY A.id
HAVING SUM(A.zeroorone) >=
ALL (SELECT SUM(AA.zeroorone)
    FROM table1 AA
    GROUP BY AA.id)

I know this counts the number of ones. I cant seem to get it

Answer 1

A CASE statement would do nicely:

SELECT SUM(CASE WHEN zeroorone = 0 
                THEN 1 
                ELSE 0 END) AS TOTAL_ZEROS
  FROM table1 

Answer 2

Using count...

SELECT COUNT(*) FROM table1 
WHERE zeroone=0