2022年11月10日(木) 13:41 Igor Korot <ikoro...@gmail.com>: > > Hi, ALL, > According to > https://chartio.com/resources/tutorials/how-to-list-databases-and-tables-in-postgresql-using-psql/, > there are generally 3 system DBs. > > However I'm confused with the word general. > How many system databases can be made on a PG server?
template0 and template1 are the mandatory system databases which cannot be dropped. "postgres" is created by default for operational convenience, but is not essential and can be removed if you really want to. Regards Ian Barwick
