reference:
https://blog.csdn.net/zhang195617/article/details/5857769
sqlplus user switching, handover to adm user command: conn adm / 123456, wherein adm user name, the password 123456
1. Create a user, such as creating wstest, password wstest1
create user wstest identified by wstest1;
2, login privileges
grant connect to wstest;
3, granting the table or view the additions and deletions to change search privileges, such as granting permission to view
grant select on DEPT_DICT to wstest ;
4, because it is the current user's tables grant another user, it is necessary to add other users to view a table owner prefix, such as select * from A.DEPT_DICT;, so it is not convenient, without prefix if you want to query, so you have to create a current user of synonyms, synonym is effective for all users, which is equivalent to an alias
create public synonym DEPT_DICT for adm.DEPT_DICT;
You can use directly select * from DEPT_DICT when this inquiry;
5, delete users
DROP USER wstest;