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Helper II
Helper II

Remove duplicates based on condition



I'm trying to establish how I can remove the duplicates from set of data but chose the one to remove based on a condition. 


I have a record of people currently off work.

These entries are repeated each month.

I've got power query to sort it all out and return a neat list with a unique identifier of the persons name and the first day they are off. 


I want to remove any duplicates so I have a single list, but when one of the duplicates has a return date entered I want to keep that and remove those where the date isn't entered.


If there is a duplicate and none have a return date entered then it doesn't matter which one is removed.


If there is a duplicate where they both have the same start and return date then it doesn't matter which is removed.


Attached is a file that has some sample data and then a 2 additional column I've populated in excel to show if it is a duplicate and then what I would want the decision to be.


Hope this makes sense.


The below should give you an anonymised sample data 

Super User
Super User



I may be oversimplifying this, but can't you just group on [Name] and [FIRST DAY], then add an aggregated column that is MAX of [RESUMED].


It gives you this:




Now accepting Kudos! If my post helped you, why not give it a thumbs-up?

Proud to be a Datanaut!

I'll give this a go - I thought i tried it and it came up with a strange error but I'll need to loop back to it to try it out. 


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