INT AUTO_INCREMENT PRIMARY KEY
DECIMAL PRIMARY KEY
FLOAT PRIMARY KEY
DOUBLE PRIMARY KEY
DECIMAL(1,1) PRIMARY KEY
BIT PRIMARY KEY
CHAR(1) PRIMARY KEY
CHAR(128) PRIMARY KEY
CHAR(254) PRIMARY KEY
CHAR(255) PRIMARY KEY
VARCHAR(1) PRIMARY KEY
VARCHAR(120) PRIMARY KEY
VARCHAR(256) PRIMARY KEY
DATE PRIMARY KEY
DATETIME PRIMARY KEY
TIMESTAMP PRIMARY KEY
TIME PRIMARY KEY
YEAR PRIMARY KEY
BINARY PRIMARY KEY
ENUM('a','b','c') PRIMARY KEY
SET('a','b','c') PRIMARY KEY