참조 무결성 샘플 데이터
CREATE TABLE student ( sno int PRIMARY KEY NOT NULL, sname varchar(255), year int, dept varchar(255) ) ; CREATE TABLE course ( cno varchar(255) PRIMARY KEY NOT NULL, cname varchar(255), credit int, dept varchar(255), prname varchar(255) ) ; CREATE TABLE enrol ( sno int NOT NULL, cno varchar(255) NOT NULL, grade varchar(255), midterm int, final int, CONSTRAINT enrol_pkey PRIMARY KEY (sno,cno) ) ;..