How do I exclude outliers from an aggregate query?
- by Margaret
I'm creating a report comparing total time and volume across units. Here a simplification of the query I'm using at the moment:
SELECT m.Unit,
COUNT(*) AS Count,
SUM(m.TimeInMinutes) AS TotalTime
FROM main_table m
WHERE m.unit <> ''
AND m.TimeInMinutes > 0
GROUP BY m.Unit
HAVING COUNT(*) > 15
However, I have been told that I need to exclude cases where the row's time is in the highest or lowest 5% to try and get rid of a few wacky outliers. (As in, remove the rows before the aggregates are applied.)
How do I do that?
