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  • 【OCP12c】CUUG 071题库考试原题及答案解析(21)

    3.choose three

    View the Exhibit and examine the description of SALES and PROMOTIONS tables.

    You want to delete rows from the SALES table, where the PROMO_NAME column in the PROMOTIONS table has either blowout sale or everyday low price as values.

    Which three DELETE statements are valid?

    A) DELETE

    FROM sales

    WHERE promo_id = (SELECT promo_id

    FROM promotions

    WHERE promo_name = 'blowout sale')

    OR promo_id = (SELECT promo_id

    FROM promotions

    WHERE promo_name = 'everyday low price');

    B) DELETE

    FROM sales

    WHERE promo_id = (SELECT promo_id

    FROM promotions

    WHERE promo_name = 'blowout sale')

    AND promo_id = (SELECT promo_id

    FROM promotions

    WHERE promo_name = 'everyday low price');

    C) DELETE

    FROM sales

    WHERE promo_id IN (SELECT promo_id

    FROM promotions

    WHERE promo_name = 'blowout sale'

    OR promo_name = 'everyday low price');

    D) DELETE

    FROM sales

    WHERE promo_id IN (SELECT promo_id

    FROM promotions

    WHERE promo_name IN ('blowout sale','everyday low price'));

    Answer:ACD

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  • 原文地址:https://www.cnblogs.com/cnblogs5359/p/10406151.html
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