OCP-1Z0-051-V9.02-49题

49. The ORDERS table belongs to the user OE. OE has granted the SELECT privilege on the ORDERS

table to the user HR.

Which statement would create a synonym ORD so that HR can execute the following query successfully?

SELECT * FROM ord;

A. CREATE SYNONYM ord FOR orders; This command is issued by OE.

B. CREATE PUBLIC  SYNONYM    ord FOR orders; This command is issued by OE.

C. CREATE  SYNONYM    ord FOR oe.orders; This command is issued by the database administrator.

D. CREATE PUBLIC SYNONYM ord FOR oe.orders; This command is issued by the database  administrator.

Answer: D

答案解析：

参考： http://blog.youkuaiyun.com/rlhua/article/details/12781353

题意的问题，要创建一个同义词，使HR用户可以通过 SELECT * FROM ord;来查询OE的orders表。

只能由数据库管理员创建公用的同义词，使HR用户来访问。

C创建的私有同义词，因为由DBA用户创建的，所以只能由DBA用户访问。