TINYINT 8位
SMALLINT 16位
MEDIUMINT 24 Wei
INT 32 bit
BIGINT 64 Wei
Values in the range -2 (N-1) to 2 (N-1) -1 where N is the number of bits stored
There UNSIGED integer type attribute indicates no negative
But this can be no real meaning it will not be worth the legal limit in the range of specified width integer types such as INT (11) for storing calculated for INT (1) and INT (20) are the same