What is the postgres version of USE?

use-alternative.sql

CREATE ROLE dunder_mifflin_admin;

CREATE DATABASE bookmarks OWNER dunder_mifflin_admin;

-- USE bookmarks ---

CREATE TABLE bookmarks (
  id          INTEGER primary key generated by default as identity,
  title       text NOT NULL,
  url         text NOT NULL,
  description text,
  rating      INTEGER  CHECK(rating >= 1 AND rating <= 5)
);

-- Full Bookmarks --

INSERT INTO bookmarks (title, url, description, rating) VALUES('Site Alpha', 'http://example.com', 'Alpha Alpha Alpha', 1);

INSERT INTO bookmarks (title, url, description, rating) VALUES('Site Bravo', 'http://example.com', 'Bravo Bravo Bravo', 2);

INSERT INTO bookmarks (title, url, description, rating) VALUES('Site Charlie', 'http://example.com', 'Charlie Charlie Charlie', 3);

INSERT INTO bookmarks (title, url, description, rating) VALUES('Site Delta', 'http://example.com', 'Delta Delta Delta', 4);

INSERT INTO bookmarks (title, url, description, rating) VALUES('Site Echo', 'http://example.com', 'Echo Echo Echo', 5);

-- Bookmarks Without Ratings ---

INSERT INTO bookmarks (title, url, description) VALUES('Site Foxtrot', 'http://example.com', 'Foxtrot Foxtrot Foxtrot');

INSERT INTO bookmarks (title, url, description) VALUES('Site Golf', 'http://example.com', 'Golf Golf Golf');

INSERT INTO bookmarks (title, url, description) VALUES('Site Hotel', 'http://example.com', 'Hotel Hotel Hotel');

INSERT INTO bookmarks (title, url, description) VALUES('Site India', 'http://example.com', 'India India India');

INSERT INTO bookmarks (title, url, description) VALUES('Site Juliet', 'http://example.com', 'Juliet Juliet Juliet');

-- Bookmarks Without Descriptions --

INSERT INTO bookmarks (title, url, rating) VALUES('Site Kilo', 'http://example.com', 1);

INSERT INTO bookmarks (title, url, rating) VALUES('Site Lima', 'http://example.com', 2);

INSERT INTO bookmarks (title, url, rating) VALUES('Site Mike', 'http://example.com', 3);

INSERT INTO bookmarks (title, url, rating) VALUES('Site November', 'http://example.com', 4);

INSERT INTO bookmarks (title, url, rating) VALUES('Site Oscar', 'http://example.com', 5);