I have four fields in a table:
Open date - format dd/mm/yy
Open time - format HH:MM
Close date - format dd/mm/yy
Close time - format HH:MM
I'd like to calculate in the fifth field the difference, in hours, between the open date & time and the close date & time. How am I best to do this?
Also, if i wanted to apply a working day rule to this (of 09:00 to 18:00) how could I then calculate this in days / hours.
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