In the chapter on data importing techniques, I mentioned that the built-in PostgreSQL backup utilities can also be used as data transfer tools. It does, of course, depend on the scenario we are working on, but in many cases passing data as a database backup file may be a valid and reliable solution.
Obviously, saving a backup does not output the data in a form consumable by other software packages - only by Postgres itself.
pg_dump is the utility that provides the database backup functionality. In order to get some help with it, type the following in the command line:
pg_dump --help
A great thing about pg_dump is that it allows for great flexibility when backing up a database. One can dump a whole database, a single schema, multiple schemas, a single table, or multiple tables; it is even possible to exclude specified schemas or tables.
This approach is great...
