csv import overwrite

[von Horst]

when importing csv data with option "overwrite", how can I configure which field should be matching?
Actually when importing data now, there is a new record created although data in one field is matching

 

[cheesegrits]

It goes by PK (Primary Key) values.

-- hugh

 

[von Horst]

I see.
how can I filter a list showing only records that are duplicate for a certain field?