如何从字段和 w 中获取月份名称和年份

Question

我必须从表中的字段中获取月份名称和年份，但在查询下方写入时出现错误。 请做必要的事情来纠正我的错误。 提前致谢。

询问：

select SUM(p.Actual_Amount) as buying,
    SUM(p.TotalPackageCost) as selling,
    (SUM(p.TotalPackageCost) - SUM(p.Actual_Amount)) as profit,
    COUNT(e.Enquiry_Id) as Sales,
    DATENAME(MM,e.Arrives_On) as Month,
    (DATENAME(MONTH,e.Arrives_On) +'-'+ DATENAME(YYYY,e.Arrives_On)) as Date  
from Pricing p 
    inner join Enquiry e on e.Enquiry_Id = p.Enquiry_Id where  e.Agent_Name ='Ish Travels' and  e.status = 'Confirmed By Company' 
group by DATENAME(MM,e.Arrives_On)
order by Month desc

但我收到错误：

列“Enquiry.Arrives_On”在选择列表中无效，因为它既不包含在聚合函数中也不包含在 GROUP BY 子句中。

请帮我解决错误。

Answer 1

您的 group by 子句不完整。 投影中未包含在聚合函数中的每个表达式都必须在 group by 中使用。 我很确定这是有效的：

select
    SUM(p.Actual_Amount) as buying,
    SUM(p.TotalPackageCost) as selling,
    (SUM(p.TotalPackageCost) - SUM(p.Actual_Amount)) as profit,
    COUNT(e.Enquiry_Id) as Sales,
    DATENAME(MM,e.Arrives_On) as Month,
    (DATENAME(MONTH,e.Arrives_On) +'-'+ DATENAME(YYYY,e.Arrives_On)) as Date  

from
    Pricing p inner join Enquiry e on e.Enquiry_Id = p.Enquiry_Id

where
    e.Agent_Name ='Ish Travels'
and
    e.status = 'Confirmed By Company'

group by
    DATENAME(MM,e.Arrives_On),
    (DATENAME(MONTH,e.Arrives_On) +'-'+ DATENAME(YYYY,e.Arrives_On))

order by
    5 desc