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Dump PostgreSQL

The pg_dump command is used to create a backup of a PostgreSQL database. Here is a basic example of the pg_dump command:

pg_dump -U username -h hostname -d database_name -f output_file.sql

Here,

  • -U username: The username for the database connection.
  • -h hostname: The hostname of the database server. If the database is on the same machine, you can omit this or use localhost.
  • -d database_name: The name of the database you want to dump.
  • -f output_file.sql: The file where the dump will be saved.

Additionally options,

  • -F c: Output the dump in the custom format, which can be restored with pg_restore.

Example

pg_dump -U myuser -h localhost -d mydatabase -F c -f mydatabase_backup.dump
  • -W: Force pg_dump to prompt for a password before connecting to the database.
  • -n schema: Dump only schemas matching the specified schema.
  • -t table: Dump only tables matching the specified table.
  • -v: Verbose mode. Prints more detailed information about the progress of the dump.

Example

pg_dump -U myuser -h localhost -d mydatabase -F c -v -f mydatabase_backup.dump

Note: Replace myuser, localhost, mydatabase, and mydatabase_backup.sql with your actual PostgreSQL username, hostname, database name, and desired output file name.