114.View the Exhibit and examine the structure of the SALES table.

114.View the Exhibit and examine the structure of the SALES table.
The following query is written to retrieve all those product ID s from the SALES table that have more than
55000 sold and have been ordered more than 10 times.
SQL> SELECT prod_id FROM sales
WHERE quantity_sold > 55000 AND COUNT(*)>10
GROUP BY prod_id
HAVING COUNT(*)>10;

Which statement is true regarding this SQL statement?
A.It executes successfully and generates the required result.
B.It produces an error because COUNT(*) should be specified in the SELECT clause also.
C.It produces an error because COUNT(*) should be only in the HAVING clause and not in the WHERE clause.
D.It executes successfully but produces no result because COUNT(prod_id) should be used instead of COUNT(*).
答案：C
解析：count 这种聚合函数不能直接用在where语句中，要不就是整体的sql，要不就用在having中