Comparing binary values in MySQL

Question

Say you have two binary values

001011 
001111

How can you get the number of different bits in MySQ

Answer 1

SELECT BIT_COUNT(b'001011' ^ b'001111');

Answer 2

SELECT BIT_COUNT( CONV( '001011', 2, 10 ) ^ CONV( '001111', 2, 10 ) )

Answer 3

It's converting the numbers 1011 and 1111 (base 10) to binary and doing the comparison. If you did:

SELECT BIT_COUNT(11 ^ 15)

It'd work.