select t.table_name from user_constraints t
where t.constraint_type='R' and t.r_constraint_name
in(
select s.constraint_name from user_constraints s
where s.table_name='主表名' and s.constraint_type='P')
select t.table_name from user_constraints t
where t.constraint_type='R' and t.r_constraint_name
in(
select s.constraint_name from user_constraints s
where s.table_name='主表名' and s.constraint_type='P')