创建dblink

1.赋予权限
select * from user_sys_privs where user='zqb'and privilege like '%DATABASE LINK%';
grant create public database link to ;
2.创建DBlink
create public database link TESTLINK connect to zqb identified by "123456" using 'orcl2'
3.操作
select * from buy1s@TESTLINK;
create synonym testlinkbuy1s for buy1s@TESTLINK;