Re: Supprimer les doublonsAn easy ad hoc solution could be to right-click and press select matching cells and then hit delete.

Does that help?
cheers
Christian
Re: Remove duplicatesI am looking to in the same column, remove all duplicates but keep exactly 1 time the value corresponding to all duplicates.
Thanks anyway !
Re: Supprimer les doublonsYou can do it using the row selection menu.
First, you find and select duplicates (see below).
Then, you simply delete the rows selected (same menu, Rows>Delete Rows)

Be aware that you get different answers depending on the columns you are selecting (if none, JMP looks at all columns).
Re: Supprimer les doublonsHi @hcarr01,
Another option could be to use the platform "Subset" available in the menu "Table".
Here is my example datatable before (with duplicate values):

Then using the platform "Subset", specifying that I want only one value for each levels/unique values of my column (using my selected column as a stratification), you end up with the result you want :

As you can see, there are many ways to do this in JMP 
I hope this will help you,
Remove DuplicatesHow to remove duplicates (same values) in the same column?
Quality and Process Engineering