I:什么是同义词?
相当于alias(别名),比如把user1.table1在user2中建一个同义词table1 create synonym table1 for user1.table1; 这样当你在user2中查select * from table1时就相当于查select * from user1.table1;
II:如何创建,删除,查看同义词?
1.在user用户中给当前用户(user2)授权: grant select/delete/update on user2
创建同义词:
create public synonym table_name for user.table_name;
2.删除同义词:
drop public synonym table_name;
3.查看所有同义词:
select * from dba_synonyms