将某个用户的所有表的查询权限授权给另一个用户

SQL> show user;
USER is "SCOTT"

SQL> select table_name from user_tables;

TABLE_NAME
------------------------------
DEPT
EMP
BONUS
SALGRADE

SQL> select 'grant select on ' || table_name || ' to test051;' from user_tables;

'GRANTSELECTON'||TABLE_NAME||'TOTEST051;'
----------------------------------------------------------
grant select on DEPT to test051;
grant select on EMP to test051;
grant select on BONUS to test051;
grant select on SALGRADE to test051;

SQL> grant select on DEPT to test051;
grant select on EMP to test051;
grant select on BONUS to test051;
grant select on SALGRADE to test051;
Grant succeeded.

SQL>
Grant succeeded.

SQL>
Grant succeeded.

SQL>

Grant succeeded.