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【单选题】
有如下查询语句 : SELECT DISTINCT productName, price FROM product WHERE (price>(SELECT AVG(price) FROM product)) ORDER BY price DESC; 下面说法错误的是 ( ) 。
A.
"SELECT AVG （ price ） FROM product " 是子查询
B.
"ORDER BY price DESC" 是指按 price 从低到高顺序排列
C.
查询结果显示的是大于平均价格的产品记录
D.
此查询显示的字段只有 "productName" 和 "price"
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