[CONSTRAINT 制約å??] { CHECK (検索æ?¡ä»¶) | { PRIMARY KEY ( å?˜ç´”列å?? [ , å?˜ç´”列å?? ]* ) | UNIQUE ( å?˜ç´”列å?? [ , å?˜ç´”列å?? ]* ) | FOREIGN KEY ( å?˜ç´”列å?? [ , å?˜ç´”列å?? ]* ) REFERENCES 節 } }