I have created time buckets before for hours and every 15 minutes.
I need to create a time bucket for every minute in a Day, I am creating this at the moment from a time field, however I need to create one for every minute regardless if that minute exists in my time field.
I need to create a chart that shows 1440 minutes for each day and then show transactions for each minute on the chart, so I need to show the minutes even if no transactions happened
Do as you would do with a Master Calendar that should show all dates, even if there weren't any sales on some of them: create a time bucket definition that is external to your "facts". You can easily make this a continuous range without holes. Then link these to your transations. Use whatever key you like.