|-
| valign='top' | '''Summary'''
|Opens This command combined [[#CREATE DATABASE|CREATE DATABASE]] and [[#OPEN|OPEN]]: it opens an existing database for the specified {{Mono|[input]}} or, (if a user has sufficient the required permissions, ) creates a new database.
|-
| valign='top' | '''Errors'''
|The command fails if the addressed database could beither neither be opened nor created.
|}