Removes all rows from a Power Query table where the values in the selected columns duplicate earlier values. The row with the first occurrence of a value set is not removed.
For example, a table has four columns.
Select Column2 and Column4 then select Remove Duplicates. The third row is removed because the values in Column1 and Column4 are the same in both instances.
To remove duplicates
In the Query Editor preview grid, select columns.
Using the Query Editor ribbon
In the Query Editor ribbon, click Remove Duplicates.
Using the Query Editor context menu
In the Query Editor ribbon, click Remove Duplicates. You can also right click and click Remove Duplicates.