Despite the documentation, I don’t understand whether the size is DECIMAL(1,0)“rounded” to four bytes or whether one digit is considered a “left digit”, which results in a single byte width for the entire data type.
, , TINYINT, a TINYINT - , - ( , !).
, TINYINT. - .
, , ENUM s, , , . 255 , TINYINT, .
ENUM('0', '1', '2', '3', '4', '5', '6', '7', '8', '9')
, . .