来自三列的SQL SUM不起作用

Question

I have an expression combining two queries, which works fine

SELECT FinalIncoming.ID, FinalIncoming.ProductCode, FinalIncoming.ProductName, 
  FinalIncoming.StandardCost, FinalIncoming.OnHand, FinalOutgoiing.Incoming, 
  FinalIncoming.Outgoing
FROM FinalIncoming INNER JOIN FinalOutgoiing ON FinalIncoming.ID = FinalOutgoiing.ID;

But whenever I try to SUM up the last three columns with:

Sum([FinalIncoming.OnHand]+[FinalIncoming.Outgoing]-[FinalOutgoiing.Incoming])

Access comes up with an error saying Your query does not include the specified expression 'ID' as part of an aggregate function.

Does anyone know what I'm doing wrong here? I've tried rewriting the SUM expression in different ways, and with aliases, but it comes up with the same error.

FYI: I know the Outgoiing query is misspelled.

Answer 1

the keyword in your error message is "as part of an aggregate"

ACCESS SQL requires all columns to be involved in an aggregation when you use the group by function.

so your query would be:

SELECT FinalIncoming.ID, FinalIncoming.ProductCode, FinalIncoming.ProductName, 
      first(FinalIncoming.StandardCost) as firstCostValue, SUM(FinalIncoming.OnHand + FinalOutgoiing.Incoming - FinalIncoming.Outgoing) AS something
    FROM FinalIncoming INNER JOIN FinalOutgoiing ON FinalIncoming.ID = FinalOutgoiing.ID
GROUP BY FinalIncoming.ID, FinalIncoming.ProductCode, FinalIncoming.ProductName;