删除单价在10-20（包括边界值）的商品。下列语句错误的是（ ）。 A. DELETE FROM 商品 WHERE 单价 >=10 OR 单价 <=20 B. DELETE FROM 商品 WHERE 单价 >=10 AND 单价 <=20 C. DELETE FROM 商品 WHERE 单价 >=10 OR <=20 D. DELETE FROM 商品 WHERE 单价 >=10 AND <=20
答案是:DELETE FROM 商品 WHERE 单价 >=10 OR 单价 <=20 , DELETE FROM 商品 WHERE 单价 >=10 OR <=20 , DELETE FROM 商品 WHERE 单价 >=10 AND <=20
