Remove Duplicates based on one column

Renga3037

Hi All

Here is my requirement.

I wanna remove duplicate rows based on one column. Is there any way to do in DSS recipes.

Please advise

Thanks in advance

GCase

@Renga3037
in the "Distinct" visual recipe you can choose either to remove duplicates based on all columns or choose a subset including one column. If you choose to use one column it will return only that one column and just the distinct values. If you need to create some logic (like the first value based on some sort of Sort) then you should look at the Window recipe which allows you to choose First, Last, Lag, etc.

Renga3037

@GCase
Agreed, but I want all the column as output not only distinct column !

GCase

Can you be more specific

For example, assume ID is the column you want to have uniques

ID First_Name Last_Name Year_Entered
1 Lebron James 2004
2 Michael Jordan 1985
2 Larry Bird 1980

What would the dataset you returned look like based on that list?

@Renga3037

Renga3037

@GCase

Correct, I want unique ID (removing duplicates)

Result would be like this

1 Lebron James 2004

2 Michal Jordan 1985

Hope you get that

GCase

Why Michael Jordan? Was it because that was the first row or some other reason?

Grant

@Renga3037

Mehdi

I think it's because it keeps the first distinct ID that he sees. @GCase

Unfortunately, the distinct recipe as it is in DSS won't allow this.

Two solutions in my mind:

Convert this request in SQL , something like:

SELECT DISTINCT ON (your_column) your_table.*

FROM your_table

ORDER BY your_column;

OR

Add a windows recipes before and compute a column with a rank, which will be used in the distinct recipe as pre-filter.

@Renga3037

Tut

I had the same problem... Too bad it was not answered. I don't understand why DSS keeps only the distincts columns...

Jurre

Maybe a grouping-recipe can be of help ? Group on the ID column and set aggregations for other columns to "first". That will leave you with unique values in the ID column and everything but the first value of duplicates filtered out.

Muhanned

Yes, I agree with @Jurre
. You achieve the task of removing duplicates based on one column while keeping all other columns data in the output dataset by using the trick she explained in "Group" recipe.

Alternatively, you can use code recipe: Remove duplicate rows in one column - Dataiku Community

For Dataiku developers, yes, I think it would be useful to update the "Distinct" recipe such as you can choose the output of recipe to easily achieve this task (as the "Distinct" recipe is what comes to my mind to do such tasks).

Just for clarification, the task is:

- find unique combinations (based on one or more columns)

- keep one row of each combination WITH ASSOCIATED data from other columns (i.e., keep the whole original row)

Jurre

Welcome @Muhanned
!

If you have a clear idea about improvements for the Distinct-recipe please share it on the product idea pages, we can't expect our dear DataIkers to scan every conversation for possible improvement-proposals.

Personally i'm a big fan of grouping together with options like concat and it's suboption "concat distinct". With a following prepare recipe values in such a concatenated column can be distributed again. But there are multiple ways to get some solid results.

Muhanned

Great! thanks for sharing the link @Jurre

Ioannis

same issue here. Is there any update on this?

tgb417

This thread might be of help to folks

https://community.dataiku.com/t5/Using-Dataiku/How-to-identify-duplicates-in-a-data-set/m-p/25823

mahesh059

Hi All, I have a situation to filter our duplicate projects in UI along with owners information, so that I can inform the concerned owners to delete their duplicate projects from their application to save disk space. Is there a way we can sort it down.

I can see two options in front of me as below. My Dataiku version is - 11.0.3

Administration >Monitoring >Summary > Scroll down to check all the project names - Here neither we can see the Project owner information nor duplicates

Administration > Projects > Click on each project and check whether it's duplicated or not along with owners or who created the project.

Is there any other way we can simply filter it down , please suggest ?

Turribeach

Please start a new thread as your question is totally different than this thread.