单选题

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

发布日期：2020-04-10

an error because the ROUND function specified is invalid

an error because the WHERE condition specified is invalid

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

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

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