Any way to duplicate/copy part of data with select "into"

I need to fix data etc but select into unlike rdbms is creating continuous queries .Is there any way other than exporting the data out and importing back in !

This data needs to be over-written, either extract it and rewrite or if you have the just write it again. The influx command like option has the import option if in case you have the raw data available.

Is there no way inside the database to do the ETL processsing since the data could be huge if extracted out!