tutorial - Backup and Restore PostgreSQL DB

SQL Dump
The idea behind the SQL-dump method is to generate a text file with SQL commands that, when fed back to the server, will recreate the database in the same state as it was at the time of the dump. PostgreSQL provides the utility program pg_dump for this purpose. The basic usage of this command is:

pg_dump dbname > outfile

As you see, pg_dump writes its results to the standard output

Restoring the dump
 The text files created by pg_dump are intended to be read in by the psql program. The general command form to restore a dump is

psql dbname < infile

where infile is what you used as outfile for the pg_dump command. The database dbname will not be created by this command, you must create it yourself


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