checking column value uniqueness using prepare receipe.

[PARA]

How to check to check if the values in a column are unique or duplicate using visual recepie.

[Manuel]

You can use a Group recipe to group by the column and count the number of occurrences of each value. If you need this data in the input table, the next step is to do a Join between the input and output tables of the Group recipe.

I hope this helps.