How to count diffrent rows in MySQL ? (three columns as a whole)

Question

How to count rows with distinct values on any of the three columns: col1, col2, col3?

Answer 1

SELECT  COUNT(DISTINCT col1, col2, col3)
FROM    mytable

Answer 2

Blind kick:

SELECT count(*) FROM YourTable
WHERE  Col1 <> Col2 OR Col1 <> Col3 OR Col2 <> Col3