---
title: "Humphrey Kinoti (@HumphreyKn) | Hashnode"
description: "Data Scientist. Read the latest articles by Humphrey Kinoti on Hashnode."
url: "https://hashnode.com/@HumphreyKn"
---

@HumphreyKn

# Humphrey Kinoti

@HumphreyKn · Nairobi · Joined February 2023

Data Scientist

### [A Quick Guide to Keys, JOINs, and Referential Integrity in SQL Databases.](https://humphreykn.hashnode.dev/a-quick-guide-to-keys-joins-and-referential-integrity-in-sql-databases?utm_source=hashnode&utm_medium=feed)

SQL Keys Keys are essential concepts in database design. They are commonly used in JOINs to establish relationships between tables. In this article, I will explain the concept of primary keys and foreign keys, their relationship to JOINs and provide ...

7 min read · [humphreykn.hashnode.dev](https://humphreykn.hashnode.dev/a-quick-guide-to-keys-joins-and-referential-integrity-in-sql-databases?utm_source=hashnode&utm_medium=feed)

[1](https://hashnode.com/posts/a-quick-guide-to-keys-joins-and-referential-integrity-in-sql-databases/645f5c2d0ba4d870625f7b77) [May 13, 2023](https://hashnode.com/posts/a-quick-guide-to-keys-joins-and-referential-integrity-in-sql-databases/645f5c2d0ba4d870625f7b77)