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143.View the Exhibit and examine the structure of the PROMOTIONS table.

2016-03-09 16:25 218 查看
143.View the Exhibit and examine the structure of the PROMOTIONS table.

You have to generate a report that displays the promo name and start date for all promos that started after

the last promo in the 'INTERNET' category.



Which query would give you the required output?

A.SELECT promo_name, promo_begin_date FROM promotions

WHERE promo_begin_date > ALL (SELECT MAX(promo_begin_date) FROM promotions )AND

promo_category = 'INTERNET';

B.SELECT promo_name, promo_begin_date FROM promotions

WHERE promo_begin_date IN (SELECT promo_begin_date

FROM promotions

WHERE promo_category='INTERNET');

C.SELECT promo_name, promo_begin_date FROM promotions

WHERE promo_begin_date > ALL (SELECT promo_begin_date

FROM promotions

WHERE promo_category = 'INTERNET');

D.SELECT promo_name, promo_begin_date FROM promotions

WHERE promo_begin_date > ANY (SELECT promo_begin_date

FROM promotions

WHERE promo_category = 'INTERNET');

答案:C

解析:题目说是时间在所有的promo_category = 'INTERNET'时间的后面,因此首先排除A(这个promo_category = 'INTERNET'的位置错了)

,B(这个是相等),D(这个不是所有)
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