我正在尝试加入3个表格以获得以下结果:
Table_A: Customer Product Div_Num Importance C1 P1 X .5
Table_B: Div_Num Div_Name X Arizona
**Table_C:** *Customer Product Sales* C1 P1 15 C1 P1 20
**Desired Results:** *Customer Product Div_Name Importance Sum(Sales)* C1 P1 Arizona .5 35
Select Table_A.Customer, Table_A.Product, Table_B.Div_Name, Table_A.Importance, sum(Table_C.Sales)
From Table_A
Inner Join Table_B
On Table_A.Div_Num = Table_B.Div_Num
Inner Join Table_C
On Table_A.Customer = Table_C.Customer And Table_A.Product = Table_C.Product
Where Table_A.Product IN ('P1', 'P2', 'P3')
我收到错误42S02(29):关系不存在
答案 0 :(得分:0)
您忘记了GROUP BY
Select Table_A.Customer, Table_A.Product, Table_B.Div_Name, Table_A.Importance, sum(Table_C.Sales)
From Table_A
Inner Join Table_B
On Table_A.Div_Num = Table_B.Div_Num
Inner Join Table_C
On Table_A.Customer = Table_C.Customer And Table_A.Product = Table_C.Product
Where Table_A.Product IN ('P1', 'P2', 'P3')
GROUP BY Table_A.Customer, Table_A.Product, Table_B.Div_Name, Table_A.Importance
答案 1 :(得分:0)
我建议总和按术语分组。你不能拥有它,除非你有一个小组来创建你要总结的汇总。你可能需要:
group by Table_A.Customer, Table_A.Product, Table_B.Div_Name, Table_A.Importance