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Hi Don,

It occurs to me my OP may not have been as clear as it should be.
To clarify, I need to calculate the decimal value of the times
involved: (([day_end]-[day_start])-([lunch_end]-[lunch_start])) =
H.nn worked

So, for example: ((17:00-08:00)-(13:00-12:00)) = 8.0

This one works:
SELECT "ID", "DayBegin", "DayEnd", "LunchBegin", "LunchEnd",
DATEDIFF('hh',"DayBegin", "DayEnd")-DATEDIFF('hh',"LunchBegin",
"LunchEnd") AS "Worked" FROM "Times"

Examples I have written down in Base-Handbook. But the newer versions
aren't translated yet from German to English.

Be careful with the example. It does only work with the value for the
hour. So you get the same with
(17:00-08:00)-(13:00-12:00)
and for example
(17:10-08:00)-(13:00-12:00)

So it would be better to write down the same code for minutes:
SELECT "ID", "DayBegin", "DayEnd", "LunchBegin", "LunchEnd",
DATEDIFF('mi',"DayBegin", "DayEnd")-DATEDIFF('mi',"LunchBegin",
"LunchEnd") AS "Worked" FROM "Times"

So you get the workingtime in minutes. Devide it with 60.00 (.00 for
the decimal places) and you get a better diff for hours than in the
first query.

Regards

Robert
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