1. ORACLE中查看表中的外键来源于哪些表
select cl.table_name
from user_cons_columns cl
left join user_constraints c
on cl.constraint_name = c.r_constraint_name
where c.constraint_type = ‘R‘
and c.table_name = ‘表名‘
2.Oracle中查看表中的主键被被哪些表引用为外键
原文：http://www.cnblogs.com/an5211/p/6770459.html