Oracle数据库表结构对比

用SQL对比数据库表结构

首先登陆数据库T，执行下面语句使T可以连接到数据库C：
link_name：C的连接名
user_name：C的用户名
paw：C的密码

create database link link_name   
  connect to user_name identified by "paw"
  using '127.0.0.1/orcl'; 
  
select * from WEB_CERTNO_CHECKDETAIL@JCBWG;

执行下面语句进行表字段对比

select *
  from (select t1.TABLE_NAME, t1.COLUMN_NAME, t1.DATA_TYPE
          from user_tab_columns t1
         where not exists (select 1
                  from ([e-mail]) t2
                 where t1.TABLE_NAME = t2.table_name
                   and t1.DATA_TYPE = t2.data_type
                   and t1.COLUMN_NAME = t2.column_name)) t;