All fixed! The app generating the data now uses a decimal instead of a colon! ``` select start, end, duration from ( select min(datetime) as start, max(datetime) as end, julianday(max(`datetime`)) - julianday(min(`datetime`)) as duration from table1 ); ``` ``` ┌─────────────────────────┬─────────────────────────┬─────────────────┐ │ start │ end │ duration │ ├─────────────────────────┼─────────────────────────┼─────────────────┤ │ 2021-07-19 08:43:46.956 │ 2021-07-20 15:18:26.623 │ 1.2740702200681 │ └─────────────────────────┴─────────────────────────┴─────────────────┘ ``` Thanks for the time and education!