Query from 2 queries.

[Roger Martens]

In have 2 queries A and B. A with following fields: Year, Period,Machine,
Production and B with Year, Period, Machine, Hours. I should like to make a
report with this records and calculate the production per hour for each.
machine. I make one query with A and B as a source for this report. But it
does'nt work. Why
Erato.

 

[Guest]

Try this:

-Create a new query
-Change to SQL view
-Paste this SQL statement

SELECT A.Year, A.Period, A.Machine, Sum(A.Production) AS Total_Production,
Sum(B.Hours) AS Total_Hours, [Total_Production]/[Total_Hours] AS
Production_Per_Hour
FROM A INNER JOIN B ON (A.Machine = B.Machine) AND (A.Period = B.Period) AND
(A.Year = B.Year)
GROUP BY A.Year, A.Period, A.Machine;

-Replace your table names A and B with your actual table names
-Run the query, this query assumes that your fields Yer,Period,Machine are
of the same type in both tables and that Production and Hours are numbers

 

[Guest]

It doesnt work and itgives an error message or it just doesnt return records.
I would say start by checking the fields in your table to see that they have
the same properties
e.g year in both tables is number long or else, but the same.