在下面的查询中用emp替换[Your TABLE]

select owner,constraint_name,constraint_type,table_name,r_owner,r_constraint_name
  from all_constraints 
 where constraint_type='R'
   and r_constraint_name in (select constraint_name 
                               from all_constraints 
                              where constraint_type in ('P','U') 
                                and table_name='[YOUR TABLE]');

2015年5月发布的SQL Developer 4.1增加了一个Model选项卡，显示表外键，表外键以实体关系图的格式引用你的表。

要将其作为扩展添加到SQL Developer，请执行以下操作:

将下面的代码保存到一个xml文件(例如fk_ref.xml):

<items>
    <item type="editor" node="TableNode" vertical="true">
    <title><![CDATA[FK References]]></title>
    <query>
        <sql>
            <![CDATA[select a.owner,
                            a.table_name,
                            a.constraint_name,
                            a.status
                     from   all_constraints a
                     where  a.constraint_type = 'R'
                            and exists(
                               select 1
                               from   all_constraints
                               where  constraint_name=a.r_constraint_name
                                      and constraint_type in ('P', 'U')
                                      and table_name = :OBJECT_NAME
                                      and owner = :OBJECT_OWNER)
                               order by table_name, constraint_name]]>
        </sql>
    </query>
    </item>
</items>

将扩展添加到SQL Developer: 工具>首选项 数据库>用户定义扩展 点击“添加行”按钮 在类型中选择“编辑器”，位置是你上面保存xml文件的位置 单击“确定”，然后重新启动SQL Developer 导航到任何表，您现在应该在SQL表旁边看到一个附加选项卡，标记为FK References，其中显示新的FK信息。 参考 http://www.oracle.com/technetwork/issue-archive/2007/07-jul/o47sql-086233.html

你可以从ALL_CONSTRAINTS视图中查询:

SELECT table_name
FROM ALL_CONSTRAINTS
WHERE constraint_type = 'R' -- "Referential integrity"
  AND r_constraint_name IN
    ( SELECT constraint_name
      FROM ALL_CONSTRAINTS
      WHERE table_name = 'EMP'
        AND constraint_type IN ('U', 'P') -- "Unique" or "Primary key"
    );

在下面的查询中用emp替换[Your TABLE]

select owner,constraint_name,constraint_type,table_name,r_owner,r_constraint_name
  from all_constraints 
 where constraint_type='R'
   and r_constraint_name in (select constraint_name 
                               from all_constraints 
                              where constraint_type in ('P','U') 
                                and table_name='[YOUR TABLE]');

仅用主表名替换table_name

select *
from all_constraints
where r_constraint_name in (
select constraint_name
from all_constraints
where table_name='table_name'
);