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Asked: 2026-05-25T18:14:20+00:00

I have a field called time_elapsed that stores a sql TIME value, a start_date

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I have a field called time_elapsed that stores a sql TIME value, a start_date and end_date that are sql DATETIMES, a unique id and a batch_id that is a reference to the batches table. I’m looking to SUM the total of the time_elapsed field for every record in a date range, in the case of the example it is august first until now. If I join the batches table and group by operation_id it gives me the info that I need for individual operation_ids but not for every record combined.

select sum(TIME_TO_SEC(time_elapsed)) from batch_log 
where batch_log.start_time between DATE("08-01-2011") and DATE(NOW()) and time_elapsed is not null
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1 Answer

  1. Editorial Team

    You possibly just aren’t matching any rows with your WHERE clause. Try doing a count(*) instead of a sum to check.

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