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@Kartones
Kartones / postgres-cheatsheet.md
Last active April 25, 2025 15:42
PostgreSQL command line cheatsheet

PSQL

Magic words:

psql -U postgres

Some interesting flags (to see all, use -h or --help depending on your psql version):

  • -E: will describe the underlaying queries of the \ commands (cool for learning!)
  • -l: psql will list all databases and then exit (useful if the user you connect with doesn't has a default database, like at AWS RDS)
@qguv
qguv / functional_python.py
Created February 26, 2014 15:06
Simple examples of reduce, map, filter, lambda, and unpacking in Python 2
#!/usr/bin/env python2
# Functional Python: reduce, map, filter, lambda, *unpacking
# REDUCE EXAMPLE
add = lambda *nums: reduce(lambda x, y: x + y, nums)
def also_add(*nums):
'''Does the same thing as the lambda expression above.'''
def add_two_numbers(x, y):