Average Time Difference
I have a table which includes two timestamps - creationTS and processedTS.
I want to run a query that tells me the average difference between these two timestamps on a minute by minute basis, i.e. one row for each minute of the day, containing the total messages created in that minute and average amount of time it took to process data created in that minute.
Is this possible in a query, or do I need to grab each entry and use PHP to work out the average processing time?
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