Use PostgreSQL database in SQL script - postgresql

Question

I'm creating 3 databases from a single file:
CREATE DATABASE "products"
WITH
OWNER = postgres
ENCODING = "UTF8"
CONNECTION LIMIT = -1
IS_TEMPLATE = False;
CREATE DATABASE "accounts"
WITH
OWNER = postgres
ENCODING = "UTF8"
CONNECTION LIMIT = -1
IS_TEMPLATE = False;
CREATE TYPE role as ENUM ('employee', 'admin', 'customer');
Now I would like the type role to be created in the accounts database. The current script just creates the role in the 'default' postgres DB. I am used to MySQL syntax where I could use the 'use ' command. Any idea how I can use a similar command for a PostgreSQL script?
For additional context: this SQL file is executed in a PostgreSQL docker container upon initialisation.
I tried the following:
use the 'use' command. -> not recognised.
use the 'select' command. -> invalid.

Answer 1

In PostgreSQL you have to specify the database when you open a connection to the server. You can not switch to a different database using SQL.
From the documentation of the low-level API for opening connections:
An application program can have several backend connections open at one time. (One reason to do that is to access more than one database.)
But as #a_horse_with_no_name already pointed out if you are using psql you can use the command \connect to open a new connection to a different database.