dfr to-csv for dataframe> dfr to-csv {flags} (file)
--delimiter, -d {string}: file delimiter character--no-header, -: Indicates if file doesn't have headerfile: file path to save dataframe| input | output | 
|---|---|
| any | any | 
Saves dataframe to CSV file
> [[ab]; [12] [34]] |dfr into-df|dfr to-csvtest.csv
Saves dataframe to CSV file using other delimiter
> [[ab]; [12] [34]] |dfr into-df|dfr to-csvtest.csv-d'|'
Tips: Dataframe commands were not shipped in the official binaries by default, you have to build it with --features=dataframe flag
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    https://www.nushell.sh/commands/docs/dfr_to-csv.html