1、建立新使用者 

create user macs identified by 123456 default tablespace pdsci;

2、授權connect 和 synonym 

grant connect to macs;

grant create synonym to macs;

3、授權查詢表的許可權

grant select on PDSCI.M_TMP to t1;

4、建立同義詞

create or replace SYNONYM MACS.M_TMP FOR PDSCI.M_TMP;

5、完成。測試查詢

備註：

1、批量執行授權多表查詢許可權的查詢語句

select 'grant select on '||owner||'.'||object_name||' to t1;'
from dba_objects
where owner in ('PDSCI')
and object_type='TABLE';

2、批量執行建立同義詞查詢語句

 SELECT 'create or replace SYNONYM MACS.' || object_name|| ' FOR ' || owner || '.' || object_name|| ';'  
 from dba_objects 
 where owner in ('PDSCI')
 and object_type='TABLE';