在Oracle SQL Developer中,如果我正在查看一个表上的信息,我可以查看约束,这让我看到外键(因此这个表引用了哪些表),我可以查看依赖关系,看看哪些包引用了这个表。但是我不确定如何查找引用表的表。

例如,假设我正在查看emp表。还有一个表emp_dept,它捕获哪些员工在哪些部门工作,它通过emp表的主键emp_id引用emp表。是否有一种方法(通过程序中的某些UI元素,而不是通过SQL)来查找emp_dept表引用emp表,而不需要知道emp_dept表存在?


当前回答

SELECT DISTINCT table_name, 
                constraint_name, 
                column_name, 
                r_table_name, 
                position, 
                constraint_type 
FROM   (SELECT uc.table_name, 
               uc.constraint_name, 
               cols.column_name, 
               (SELECT table_name 
                FROM   user_constraints 
                WHERE  constraint_name = uc.r_constraint_name) r_table_name, 
               (SELECT column_name 
                FROM   user_cons_columns 
                WHERE  constraint_name = uc.r_constraint_name 
                       AND position = cols.position)           r_column_name, 
               cols.position, 
               uc.constraint_type 
        FROM   user_constraints uc 
               inner join user_cons_columns cols 
                       ON uc.constraint_name = cols.constraint_name 
        WHERE  constraint_type != 'C') 
START WITH table_name = '&&tableName' 
           AND column_name = '&&columnName' 
CONNECT BY NOCYCLE PRIOR table_name = r_table_name 
                         AND PRIOR column_name = r_column_name; 

其他回答

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]');

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"
    );

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。

这已经在产品中存在多年了——尽管在2011年的产品中还没有。

但是,只需单击Model页面。

请确保您使用的版本至少为4.0(2013年发布)才能访问此功能。

SELECT DISTINCT table_name, 
                constraint_name, 
                column_name, 
                r_table_name, 
                position, 
                constraint_type 
FROM   (SELECT uc.table_name, 
               uc.constraint_name, 
               cols.column_name, 
               (SELECT table_name 
                FROM   user_constraints 
                WHERE  constraint_name = uc.r_constraint_name) r_table_name, 
               (SELECT column_name 
                FROM   user_cons_columns 
                WHERE  constraint_name = uc.r_constraint_name 
                       AND position = cols.position)           r_column_name, 
               cols.position, 
               uc.constraint_type 
        FROM   user_constraints uc 
               inner join user_cons_columns cols 
                       ON uc.constraint_name = cols.constraint_name 
        WHERE  constraint_type != 'C') 
START WITH table_name = '&&tableName' 
           AND column_name = '&&columnName' 
CONNECT BY NOCYCLE PRIOR table_name = r_table_name 
                         AND PRIOR column_name = r_column_name;