OCP-1Z0-051 第149題 子查詢中ALL的應用
Evaluate the following SQL statement:
SQL>SELECT prod_id
FROM costs
WHERE promo_id IN
(SELECT promo_id
FROM promotions
WHERE promo_cost < ALL
(SELECT MAX(promo_cost)
FROM promotions
GROUP BY (promo_end_date - promo_begin_date)));
A. It displays prod IDs in the promo with the lowest cost.
B. It displays prod IDs in the promos with the lowest cost in the same time interval.
C. It displays prod IDs in the promos with the highest cost in the same time interval.
D. It displays prod IDs in the promos with cost less than the highest cost in the same time interval.
答案：D
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