db.mytable.import_from_csv(..., unique='my_unique_column')

will do an update instead of an insert if the value of the 
"my_unique_column" field matches that of an existing record in the database.

Anthony

On Monday, January 11, 2016 at 12:07:55 PM UTC-5, goome wrote:
>
> hi
> Does import_from_csv_file only operate insert sql statement or it could 
> also operate update record? In this case would it be enough the presence of 
> unique column in the csv(without id) for it?
> Thanks
>

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