25 - 销售分析III

-- where 是分组之前筛选数据
-- having 是分组之后筛选数据

select
    p.product_id,p.product_name 
from
    Sales s left join Product  p on s.product_id=p.product_id 
group by
    product_id
having
    min(sale_date) >="2019-01-01" and max(sale_date)<="2019-03-31";