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I would like sum data by hour. Thanks you very much!

2/4/13 13:19 0

2/4/13 13:34 2

2/4/13 13:49 0

2/4/13 14:04 0

2/4/13 14:19 14

2/4/13 14:34 18

2/4/13 14:49 0

2/4/13 15:04 34

2/4/13 15:19 0

2/4/13 15:34 38

2/4/13 15:46 2

2/4/13 15:50 0

2/4/13 16:03 0

2/4/13 16:14 0

Answer should be:

2/4/13 13:00 total

2/4/13 14:00 total

...

Grace -

Because you are searching for a time range (i.e. 13:00 through 13:59), you will need to use the SUMIFS() function. It allows you to search for multiple criteria.

=SUMIFS(SUM_RANGE,CRITERIA_RANGE1,CRITERIA1,CRITERIA_RANGE2,CRITERIA2...)

SUM_RANGE are the cells that contain the data that should be added, in the case of your sample that would be column C.

CRITERIA_RANGE1 is the cells that contain the hours. In this case, column B.

CRITERIA1 is where we begin the hourly range. Since we're trying to get anything within the 1 o'clock hour, we choose something that means "1:00 or anything after" -- ">=13:00"

If we leave it at this criteria, we'll get everything from 1:00 on. We need to put an end on the range.

CRITERIA_RANGE2 is the same as CRITERIA_RANGE1

CRITERIA2 should be for "anything before 2:00" -- "<=13:59"

The complete function for the 1 o'clock hour is:

=SUMIFS(C1:C10,B1:B10,">=13:00",C1:C10,B1:B10,"<=13:59")

Just change the time in the function to get the other hours totals. Hope this helps - Andrea

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