5 foreign key (b_id) references b (b_id),
16 a_b_id serial not null,
19 foreign key (a_id) references a (a_id),
21 foreign key (b_id) references b (b_id)
28 foreign key (b_id) references b (b_id),
36 foreign key (c_id) references c (c_id),
47 c_e_id serial not null,
50 foreign key (c_id) references c (c_id),
52 foreign key (e_id) references e (e_id)
59 foreign key (el_id) references e (e_id),
61 foreign key (em_id) references e (e_id),
63 foreign key (en_id) references e (e_id)
70 foreign key (a_id) references a (a_id),
72 foreign key (e1_id) references e (e_id),
74 foreign key (e2_id) references e (e_id)
81 foreign key (a1_id) references a (a_id),
83 foreign key (a2_id) references a (a_id),
85 foreign key (g1_id) references g (g_id),
87 foreign key (g2_id) references g (g_id),
89 foreign key (g3_id) references g (g_id)