DROP TABLE IF EXISTS  si4;
CREATE TABLE si4
       (
       groupe int,
       nom  char(10),
       ddn date
       );

INSERT INTO si4 VALUES(1, 'Paul','1989-12-09');
INSERT INTO si4 VALUES(1, 'Pierre','1991-12-09');
INSERT INTO si4 VALUES(2, 'Paul','1988-12-09');
INSERT INTO si4 VALUES(2, 'Pierre','1989-12-09');
INSERT INTO si4 VALUES(2, 'Jean','1987-12-09');
INSERT INTO si4 VALUES(3, 'Paul','1988-12-09');
