Question

我需要从Jerry（订单年）中排除2019，只显示他在2018年的销售额。我可以在代码中添加些什么，以删除Jerry的2019年销售额。我正在使用SSMS 2016。

select orderyear, case when code = '2099' then 'Laura'
                       when code = '3099' then 'John'
                       when code = '4099' then 'Jerry'
                  end as 'Members', count(sales)numberofsales
from mytable
group by orderyear, case when code = '2099' then 'Laura'
                         when code = '3099' then 'John'
                         when code = '4099' then 'Tony'
                    end

结果：

orderyear            members                numberofsales
  2018                John                       200
  2019                John                       100
  2018                Laura                      300
  2019                Laura                      350
  2018                Jerry                      400
  2019                Jerry                      450

要求：

orderyear            members                numberofsales
  2018                John                       200
  2019                John                       100
  2018                Laura                      300
  2019                Laura                      350
  2018                Jerry                      400

Answer 1

添加：

where not (code = '4099' and orderyear = 2019)

Answer 2

您可以简化为：

select 
  orderyear, 
  case code 
    when '2099' then 'Laura'
    when '3099' then 'John'
    when '4099' then 'Jerry'
  end as Members, 
  count(sales) numberofsales
from mytable
where
  orderyear <> 2019 or code <> '4099'
group by 
  orderyear, 
  code

排除给定年份的结果

2 个答案: