Connect psql -U postgres Create Db CREATE DATABASE my_test_db List Db \l Use Db \c my_test_db List Tables \d Alter Table ALTER TABLE table_name ADD COLUMN IF NOT EXISTS column_name INTEGER; ALTER TABLE table_name DROP COLUMN IF EXISTS column_name;
Backup mysql db
https://linuxize.com/post/how-to-back-up-and-restore-mysql-databases-with-mysqldump/