Create table = CREATE TABLE name_of_table (column1 data type, column2 data type);
When the code is executed, the database "name_of_database" and the table "name_of_table" are created.
list databases = \l;
list tables = \dt;
Create database = CREATE DATABASE name_of_database;
Get size of db = SELECT pg_size_pretty( pg_database_size('dbname') );