Export Postgres Database into CSV file

Question

I want to export a Postgres database into a CSV file. Is this possible?

If it is possible, then how can I do this? I have seen that we can convert a particular table into

Answer 1

Do you want one big CSV file with data from all tables?

Probably not. You want separate files for each table or one big file with more information that can be expressed in CSV file header.

Separate files

Other answers shows how to create separate files for each table. You can query database to show you all tables with such query:

SELECT DISTINCT table_name
FROM information_schema.columns
WHERE table_schema='public'
AND position('_' in table_name) <> 1
ORDER BY 1

One big file

One big file with all tables in CSV format used by PostgreSQL COPY command can be created with pg_dump command. Output will also have all CREATE TABLE, CREATE FUNCTION etc, but with Python, Perl or similar language you can easily extract only CSV data.