---
title: "#unique-key articles | Hashnode"
description: "Explore 1 articles tagged #unique-key on Hashnode. Tutorials, guides, and how-tos from the community."
url: "https://hashnode.com/tag/unique-key"
---

Tag

# #unique-key

1 posts · 0 followers

[Dikshya Subedi](https://hashnode.com/@Dikshya056) · [Aug 11, 2023](https://hashnode.com/posts/unique-key-vs-primary-key/64d61ab6e36b73d42a4ab6bc)

### [Unique Key Vs Primary Key](https://dikshyasubedi.hashnode.dev/unique-key-vs-primary-key?utm_source=hashnode&utm_medium=feed)

Primary Key: a. It must contain unique values for each row, meaning no two rows can have the same value in the primary key column(s). b. A primary key column cannot contain NULL values, as it must uniquely identify each row. c. A table can have only ...

1 min read · [dikshyasubedi.hashnode.dev](https://dikshyasubedi.hashnode.dev/unique-key-vs-primary-key?utm_source=hashnode&utm_medium=feed)