https://github.com/blackiq/know-postgres

A practical, example-driven guide to PostgreSQL, from SQL fundamentals to PostgreSQL-specific features.
https://github.com/blackiq/know-postgres

cheatsheet database examples knowx learning postgresql reference sql tutorial

Last synced: 1 day ago
JSON representation

A practical, example-driven guide to PostgreSQL, from SQL fundamentals to PostgreSQL-specific features.

• Host: GitHub
• URL: https://github.com/blackiq/know-postgres
• Owner: BlackIQ
• License: gpl-3.0
• Created: 2026-06-12T22:03:34.000Z (about 1 month ago)
• Default Branch: main
• Last Pushed: 2026-07-05T23:49:07.000Z (19 days ago)
• Last Synced: 2026-07-06T01:13:41.660Z (19 days ago)
• Topics: cheatsheet, database, examples, knowx, learning, postgresql, reference, sql, tutorial
• Homepage: https://github.com/BlackIQ/know-x
• Size: 34.2 KB
• Stars: 3
• Watchers: 0
• Forks: 0
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

Awesome Lists containing this project

README

          
# PostgreSQL Cheat Sheet

A very simple, good, fast way to learn **PostgreSQL** (if you already know SQL) also you may learn SQL here too.

## Chapters

It has kind of everything a beginer need to know. Even `JOIN` or other things. But in category:

- `TABLE`: Create, Drop, Truncate, Not NULL stuff

- `SELECT`: All columns, specified columns

- `INSERT`: Simple way, specified columns, insert many

- `WHERE`: Covering important things like between, less, more and etc

- `UPDATE`: Updating single row and multi rows with WHERE

- `DELETE`: Deleting single row and multi rows with WHERE

- `ORDER BY`: Sorting one col, more than one col having ASC and DESC

- `GROUP BY`: Base of grouping and aggrigation

- `HAVING`: Maybe another time I'll add it

- `LIMIT`: Using sort and limit

- `ALTER TABLE`: Add columns, remove columns

- `Multi Table`: Having more than 1 tables

- `FOREIGN KEY`: Relation Matters Most (RMM)

- `JOIN`: A brief of how is join working. **EVEN GOD DOESN'T KNOW**

- `JOIN`: Using INNER, LEFT, RIGHT and FULL. **EVEN GOD DOESN'T KNOW**

- `Relations`: One to One (1:1), One to Many (1:N), Many to Many (N:N)

## Why PostgreSQL cheat sheet?

This is 1:30 AM Jun 13 here in Tehran, ran out of Melatonin pils. So, creating this cheat sheet is only thing I could do.

---

### Enjoy :)