how to get db dump postgresql code example

Example 1: postgres make sql dump

pg_dump -U username dbname > dbexport.pgsql

Example 2: postgresql dump and restore db

#To dump a database called mydb into a SQL-script file:
pg_dump mydb > db.sql

#To reload such a script into a (freshly created) database named newdb:
psql -d newdb -f db.sql