/* During cleanup or testing, it occasionally happens that we get multiple entries corresponding to the same log. The following query provides a convenient way to look at them, for manual cleanup. */ -- How often was that log found in total? select howoften, -- How many rows correspond to that setup_id? (select count(*) from rawdata where rawdata.setup_id = setup.setup_id) howmany, -- General info setup_id, logging_start_time, distance, duration, upload_time from setup -- Subtable to count how many times each logging start time occurs join (select count(*) howoften, logging_start_time starttime from setup group by logging_start_time -- Logs occuring only once aren't interesting to us here having count(*) > 1 ) overlogged on logging_start_time = starttime -- To make it visually easier to compare the ones belonging together order by logging_start_time;