118.View the Exhibit and examine the structure of the PROMOTIONS table.

118.View the Exhibit and examine the structure of the PROMOTIONS table.

Examine the following two SQL statements:

Statement 1

SQL>SELECT promo_category,SUM(promo_cost) FROM promotions

WHERE promo_end_date-promo_begin_date > 30

GROUP BY promo_category;

Statement 2

SQL>SELECT promo_category,sum(promo_cost) FROM promotions

GROUP BY promo_category

HAVING MIN(promo_end_date-promo_begin_date)>30;

Which statement is true regarding the above two SQL statements?



A.statement 1 gives an error, statement 2 executes successfully

B.statement 2 gives an error, statement 1 executes successfully

C.statement 1 and statement 2 execute successfully and give the same output

D.statement 1 and statement 2 execute successfully and give a different output

答案：D

解析：首先应该确定1和2执行都是正确的，1的条件在where中，是在group by之前进行过滤行

2的条件是在having中，是在group by之后进行过滤的，因此他们不一样