ROW_NUMBER() Window Function — find duplicate values.

Many times, we do not want duplicate rows or values in our SQL tables. On the other hand, in some situations, it does not matter if there are duplicates present. For whatever reason, suppose duplicates have found their way into one of your tables. How can you find them quickly and easily? The ROW_NUMBER() Window function is a fantastic tool to use. Continue reading and see example queries you can apply to your own tables and find those duplicates…

--

--

--

No Matter What People Tell You, Words And Ideas Can Change The World.

Recommended from Medium

AWS Compute Services Introduction

CS373 Spring 2022: Matthew Kozlowski — Week 10

The Hard Truth About Programming

Static Libraries vs. Dynamic Libraries

Firebase Authentication in Unity with REST API

Python script to push sample data to InfluxDB

CS371p Fall 2020: Amit Samuel

Creating a Sword Arc Effect In Unity 2d

Get the Medium app

A button that says 'Download on the App Store', and if clicked it will lead you to the iOS App store
A button that says 'Get it on, Google Play', and if clicked it will lead you to the Google Play store
Joshua Otwell

Joshua Otwell

SQL and PHP/CodeIgniter Developer. Growing through Technical Writing and Blogging. Sign-up for my free newsletter here: openlamptech.substack.com

More from Medium

SQL by steps #8: UPDATE — modifying data

MySQL String Concatenation with CONCAT()

Normalization in SQL

Introduction to SQL

Fig : Relational Database Design (source : researchgate.net)