SQL： 某个时间段范围内，产品有价格，且求平均数

select ID,AVG(fPrice) as avgPrice from Price
where Hp_Date >='2017-07-04' and  Hp_Date <='2017-07-06'
group by ID
having SUM(case when ISNULL(fPrice,0) > 0 and Status=0 then 1 else 0 end)=天数