Time series query to get concurrency

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October 26th, 2009, 05:07 PM

dtrobert

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Join Date: Nov 2007

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Time series query to get concurrency

Hi
I have a dataset which has a list of 'jobs' containing

ID, starttime, endtime

I'm trying to design a query which can tell me how many concurrent jobs I had vs time.

In other words, let's say I have

ID starttime endtime

1 11:00 11:03

2 11:01 11:05

3: 11:02 11:03

4: 11:04 11:07

and want the concurrency at a minute interval. I would get

time numberOfConcurrent

11:00 1

11:01 2

11:03 2

11:04 2

Does anyone know if such a query could even be constructed?

Thanks

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