（81）You are currently located in Singapore and have connected to a remote database in Chicago. You issue the following command:

SELECT ROUND(SYSDATE - promo_begin_date, 0)

FROM promotions

WHERE (SYSDATE - promo_begin_date)/365 > 2;

PROMOTIONS is the public synonym for the public database link for the PROMOTIONS table. What is the outcome?

A. an error because the ROUND function specified is invalid

B. an error because the WHERE condition specified is invalid

C. number of days since the promo started based on the current Chicago date and time

D. number of days since the promo started based on the current Singapore date and time

答案：（C）

解析：

SYSDATE返回的是实际执行查询的服务器的系统时间。

ITPub博客

OCP 1Z0-051-81