See the Exhibit and examine the structure of the PROMOSTIONS table:
Exhibit:
Which SQL statements are valid? (Choose all that apply.)
A. SELECT promo_id, DECODE(NVL(promo_cost, 0), promo_cost, promo_cost * 0.25, 100) "Discount"
FROM promotions;
B. SELECT promo_id, DECODE(promo_cost, 10000,
DECODE(promo_category, ‘G1’, promo_cost *.25, NULL),
NULL) "Catcost"
FROM promotions;
C. SELECT promo_id, DECODE(NULLIF(promo_cost, 10000),
NULL, promo_cost*.25, ‘N/A’) "Catcost"
FROM promotions;
D. SELECT promo_id, DECODE(promo_cost, >10000, ‘High’,
<10000, ‘Low’) "Range"
FROM promotions;
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