将多列中的1列求和

Question

我试图对我的选择查询上的数量字段进行sum（）按日期值对它们进行分组，但是Sql一直给我报错，说不是al列在我的GroupBy中分组，但是我只想按日期对它们进行分组

这是我的查询：

SELECT   Date, Clave_PDV, Che, Lin, Dish, Dish_Name, Type, 
sum(Quantity) as Quant, Price, Total, Tur, Tur_Name, Group, 
Group_Name, Pdv_Name, St_Pla, St_Che
FROM  Dish_Sales
GROUP BY Date

如何对（数量）按日期进行分组？

Answer 1

您将删除所有不需要的列：

SELECT Date, sum(Quantity) as Quant
FROM Dish_Sales
GROUP BY Date;

Answer 2

如果您想按日期计算总和，则我们应该

SELECT   Date, sum(Quantity) as Quant
FROM  Dish_Sales
GROUP BY Date

否则，您应对所有未汇总的列使用分组依据

SELECT   Date, Clave_PDV, Che, Lin, Dish, Dish_Name, Type, 
sum(Quantity) as Quant, Price, Total, Tur, Tur_Name, Group, 
Group_Name, Pdv_Name, St_Pla, St_Che
FROM  Dish_Sales
GROUP BY Date, Clave_PDV, Che, Lin, Dish, Dish_Name, Type, 
     Price, Total, Tur, Tur_Name, Group, 
      Group_Name, Pdv_Name, St_Pla, St_Che