BIN()
BIN(number)This function returns a binary number for a given integer. It returns NULL if the input is NULL:
SELECT BIN(1), BIN(2), BIN(3); +--------+--------+--------+ | BIN(1) | BIN(2) | BIN(3) | +--------+--------+--------+ | 1 | 10 | 11 | +--------+--------+--------+
For the number 1 in a base 10 system, the first position in a binary system is on, or 1. For the number 2, the first position from the right is off and the second is on. For 3, the first and the second positions are on.