Joe Yoder wrote:
Scenario:
- Cursor with 2 fields TimeStamp T, and Value N(4.0) - 1 record per
second
- Output needed - BegStamp as the beginning of a time period X seconds
long and Avg as the average of the Value field for X seconds
With X = 3600 the results should give the average value for each hour.
I'm stuck on what to use for a group by expression and suspect that the
best way may be to hard code a pair of loops that increments through the
cursor one time period at a time.
Does anyone want to show me a better way?
You could just select hour(timestamp),avg(value) from mycurs group by
1. If your data goes over a day then include the date you will have to.
If you want to start part way through an hour then you can set up
tStarttime = <a datetime value> then
select (timestamp - tStarttime)/3600, avg(value) from mycurs group by
1 where timestamp >= tStarttime
Peter
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