A.SELECT 姓名,COUNT(*) AS 数量 FROM 图书,作者; HAVING COUNT(*)>=3 B.SELECT 姓名,COUNT(*) AS 数量 FROM 图书,作者; WHERE 作者.作者编号=图书.作者编号; GROUP BY 图书.作者编号 HAVING COUNT(*)>=3 C.SELECT姓名,COUNT(*) AS 数量 FROM 图书,作者; FOR 作者.作者编号=图书.作者编号; WHERE 图书.作者编号 HAVING COUNT(*)>=3 D.SELECT 姓名,COUNT(*) AS 数量 FROM 图书,作者; WHERE 作者.作者编号=图书.作者编号; GROUP BY 图书.作者编号 SET COUNT(*)>=3