Oracle数据库使用DBLINK导入远程Oracle数据库信息

    --1. 查询DBLINK权限
    select * from sys.user_sys_privs t where t.privilege like upper(‘%link%‘);
    --2. 赋予DBLINK权限
    grant CREATE PUBLIC DATABASE LINK,DROP PUBLIC DATABASE LINK to demobase;
    --3. 查询创建的DBLINK连接
    select * from DBA_DB_LINKS;
    --4. 创建DBLINK连接
    create public database link to_db11 connect to demobase identified by demobase using ‘ (DESCRIPTION =
       (ADDRESS_LIST =
         (ADDRESS = (PROTOCOL = TCP)(HOST = 11.11.11.11)(PORT = 1521))
       )
       (CONNECT_DATA =
         (SERVER = DEDICATED)
         (SERVICE_NAME = demo)
       )
     )‘;
    --5. 删除DBLINK连接
    drop public database link to_db11;

    --查询远程数据库的信息
    select * from demobase.my_demo@to_db11;
    --复制表信息
    create table my_test as select * from my_demo where 1=2 ;
    --全表复制
    create table my_test as select * from demobase.my_demo@to_db11;
    --创建临时表，复制LOB字段
    create global temporary table my_temp as select * from demobase.my_demo@to_db11;