View the Exhibit and examine the structure of the PROMOTIONS table. Which SQL statements are valid? (Choose all that apply.)
A. SELECT promo_id. DECODE(NVL(promo_cost.O).promo_cost * 0.25. 100) "Discount"
FROM promotions;
B. SELECT promo id. DECODE(promo_cost. 10000.
DECODE(promo_category. ‘Gl 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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Correct syntax:
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;