How to calculate the periods that overlap between two or more given the date range?

Hi all

If there are several durations then how we can calculate the period of time that overlap between these times.

For example: for 3 time periods. 03/12/2015-16/08/2015, 05/01/2015 to 31/07/2015 and the 06/09/2015 to 30/11/2015, how the overlap period can be calculated?

There are many potential unknowns in your question.  For example, you want to count any overlap at all?  If two dates overlap, what matters?  Overlap - each of them?

In any case, here is a solution that counts how many periods are overlapping in any point in time...  She, of course, using temporal logic.  You can then use ValueAt(), WhenLast(), WhenNext(), etc. as appropriate.

Assume that your model has a child entity called 'the period' with name 'all time periods' relationship and basic attributes 'start date of the period of time' and 'date of end of period of time'.

In your example:

an entity should have the time period start date = 03/12/2015 and the date of end of period of time = 16/08/2015

another entity might have the time period start date = 01/05/2015 and the date of end of period of time = 31/07/2015

another entity might have the time period start date = 06/09/2015 and the date of end of period of time = 30/11/2015

To find the number of overlapping over time, we want to count or entities that have an active period, so the rule is perhaps the sum:

the number of overlapping = the number of all the periods for which it is true that the time period is active

How do we know a time is active?  This is the time logic comes in.  He is active on or after the start date or no later than the end date:

the time period is active if

TemporalOnOrAfter (the date of beginning of period of time) and

TemporalOnOrBefore (date of end of period of time)

That's all.  Now, you can perform a temporal visualization of the 'number of overlapping' and you'll see it rise and fall over time.  As a reference, he said that the number of overlapping = 3.0 from 06/09/2015 across 31/07/2015.

I hope this helps.  You can use the same model to count periods of time functions, but you end up having to use the most logical date.  You of course can count the total number of entities and compare this number of overlap over time to see if they overlap, but I digress...

Tags: Oracle Applications

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