查询oracle中主外键列

Posted on by

联系：手机(13429648788)  QQ(107644445)

链接：https://www.orasos.com/%e6%9f%a5%e8%af%a2oracle%e4%b8%ad%e4%b8%bb%e5%a4%96%e9%94%ae%e5%88%97.html

标题：查询oracle中主外键列

作者：惜分飞©版权所有[文章允许转载,但必须以链接方式注明源地址,否则追究法律责任.]

一、查询表主键列

select column_name
  from dba_cons_columns
 where constraint_name in (select constraint_name
                             from dba_constraints
                            where table_name = upper('tablename')
                              and constraint_type = 'P');

二、查询表外键列

select column_name
  from dba_cons_columns
 where constraint_name in (select constraint_name
                             from dba_constraints
                            where table_name = upper('tablename')
                              and constraint_type = 'R');

三、查询表中列

select column_name
  from dba_tab_columns
 where table_name = upper('tablename');

四、查询表之间的主外键关系

select b.table_name  主键表名,
       b.column_name 主键列名,
       a.table_name  外键表名,
       a.column_name 外键列名
  from (select a.constraint_name,
               b.table_name,
               b.column_name,
               a.r_constraint_name
          from dba_constraints a, dba_cons_columns b
         WHERE a.constraint_type = 'R'
           and a.constraint_name = b.constraint_name) a,
       (select distinct a.r_constraint_name, b.table_name, b.column_name
          from dba_constraints a, dba_cons_columns b
         WHERE a.constraint_type = 'R'
           and a.r_constraint_name = b.constraint_name) b
 where a.r_constraint_name = b.r_constraint_name;