I have a PostgreSQL database running in a docker container. I used the below command to get a dump file of the Postgres database - "docker exec -t your-db-container pg_dumpall -c -U postgres > dump_date +%d-%m-%Y"_"%H_%M_%S.sql". Since it's a docker volume , the database doesn't store on the machine to use psql COPY command and such.

I have multiple tables with different headers. I need to convert the dump file into a CSV file with the headers of the table. Can be a single or multiple CSV files.

Any other way of directly getting the CSV files from the docker container database will also be appreciated.

PS: I'm a beginner in this area and would really appreciate a detailed solution

  • One might use the COPY command to export data as CSV.
    – mustaccio
    Commented Jul 16, 2022 at 13:47
  • Please clarify your specific problem or provide additional details to highlight exactly what you need. As it's currently written, it's hard to tell exactly what you're asking.
    – Community Bot
    Commented Jul 18, 2022 at 13:31

2 Answers 2


You have to use 'COPY' command,try this:

COPY (SELECT * from table) To '/path/output.csv' With CSV;
  • I'm not able to use this as the database isn't storing on the machine. Commented Jul 19, 2022 at 6:29

Using pg_dump with the -t flag could provide a plain text output for a table and you can increase the tables you need by adding that flag as much as needed. On the other hand getting a CSV output is only available via psql flag --csv.

So you can try

psql -d your_db -c 'select * from your_table' --csv 

for your need.

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