BINARY
BINARY(width)This data type stores data as binary strings, not as character strings
like CHAR does. The width given is for the maximum
width in bytes—this value must be specified. This data type replaces
CHAR BINARY. Before version 4.1.2 of MySQL, if you
added the BINARY flag after
CHAR, it instructed MySQL to treat the values as
byte strings for sorting and comparing. If a BINARY
column is used in an expression, all elements of the expression are
treated as binary.