SQL Essentials: DENSE_RANK Function Explained

Overview

The DENSE_RANK function assigns a unique rank to each row within a partition of a result set, based on the values in specified columns. Unlike the RANK function, DENSE_RANK does not leave gaps between rank values when there are ties; consecutive ranks are assigned without skipping any numbers.

In simpler terms, DENSE_RANK helps you order data by specific criteria and assigns a ranking number to each entry. If multiple entries have the same value, they receive the same rank, and the next rank continues sequentially without gaps. This is particularly useful for generating reports that require ranking items, such as identifying top-performing sales representatives or products.