將多列中的1列求和

Question

我試圖對我的選擇查詢上的數量字段進行sum（）按日期值對它們進行分組，但是Sql一直給我報錯，說不是al列在我的GroupBy中分組，但是我只想按日期對它們進行分組

這是我的查詢：

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

如何對（數量）按日期進行分組？

Answer 1

您將刪除所有不需要的列：

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

Answer 2

如果您想按日期計算總和，則我們應該

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

否則，您應對所有未匯總的列使用分組依據

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