Hi, here is a query which returns rolling sum for past5days.The resulting table has threee columns,namely,
MyDateFiled ,MyValue,Past5DaySum
SELECT tblData.MyDateField, tblData.MyValue,
(SELECT SUM(a.MyValue)
FROM tblData As a
WHERE DateDiff("d",a.MyDateField,tblData.MyDateField)
Between 0...