View the Exhibit and examine the structure of the PROMOTIONS table.
Evaluate the following SQL statement:
SQL>SELECT promo_name,CASE
WHEN promo_cost >=(SELECT AVG(promo_cost)
FROM promotions
WHERE promo_category=’TV’)
then ‘HIGH’
else ‘LOW’
END COST_REMARK
FROM promotions;
Which statement is true regarding the outcome of the above query?
A.
It shows COST_REMARK for all the promos in the table.
B.
It produces an error because the subquery gives an error.
C.
It shows COST_REMARK for all the promos in the promo category ‘TV’.
D.
It produces an error because subqueries cannot be used with the CASE expression.