geez i do have brain damage.

what you have written i already figured out (thanks, though). but i completely forgot to add a crucial component to this problem.

if the start_time of the following day is earlier that 09:00, i want it printed with the previous day. for example, if this were the output: 
id_number
CA456789   2007-01-29   16:00:00
CA456712   2007-01-30   03:00:00

[download]
i would like it to be output like this: 
2007-01-29
CA456789   16:00:00
CA456712   03:00:00

[download]
thanks again for you help

In reply to Re^2: help formatting output of particular loop by eisdrache
in thread help formatting output of particular loop by eisdrache

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