Advent of Code 2022: PostgreSQL

First create a database and load the schema with

psql < schema.sql

Then each day is self-contained and written in PSQL:

cd day01
psql < program.sql

The input is placed in input.txt alongside the program.

Limitations

PSQL syntax and macros are allowed
PostgreSQL version is 14.5
User running the code is a postgres superuser
Extensions, PLPgSQL, others languages, etc are allowed but solutions should primarily be in SQL where possible.