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Exporting and Importing CSV files to Heroku postgresql


On your local db console:
copy (select * from your_table where xyz) to '/tmp/rows.csv' With CSV;


To import above rows to your heroku db, first make sure to do a backup
heroku pgbackups:capture --expire -a your_app
Then the actual import
psql `heroku config:get DATABASE_URL -a your_app`?ssl=true -c "\copy your_table FROM '/tmp/rows.csv' WITH CSV;"
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