Aggregate SQL query grouping by month

Question

I have a database of Transactions (Access 2007) that are recorded in hourly, daily and monthly intervals. I would like to view them in a meaningful way (instead of hour-by-

Answer 1

It seems that you would need to group by both the month and the year. Otherwise, you'll have January 2010 and January 2011 combined:

SELECT YEAR(TransactionDate), MONTH(TransactionDate), SUM(Usage)
FROM YourTable
WHERE (TransactionDate Between [Some Start Date] AND[Some End Date])
GROUP BY YEAR(TransactionDate), MONTH(TransactionDate)
ORDER BY YEAR(Created), MONTH(Created)

I don't know if your version of SQL has the MONTH and YEAR functions, so you may have to use DATEPART.