C un truc comme ça que tu as ecris,
et ça marche pas ?
DECLARE
P_dir number;
BEGIN
insert into T_ANN_Direction (DIR_intID,Dir_strNOM,Dir_booAdmin)
VALUES (SEQ_T_ANN_DIRECTION.nextval, 'Administrateur', 1);
select DIR_intID into _dir from T_ANN_Direction;
insert into T_ANN_Division (DIV_intID, Div_strNOM,Div_intDirection_ID)
VALUES (SEQ_T_ANN_DIVISION.nextval, 'Administrateur', _dir);
END