Breaking Down DENSE_RANK(): A Step-by-Step Guide for SQL Enthusiasts

Introduction to SQL Window Functions

In today’s data-driven world, SQL (Structured Query Language) stands as a cornerstone for managing and manipulating database systems. A core component of SQL’s power and flexibility lies in its window functions, a category of functions that perform calculations across sets of rows related to the current row.

Imagine you’re looking at your data through a sliding window, and based on the position and size of this window, you perform calculations or transformations on your data. That’s essentially what SQL window functions do. They handle tasks like the computation of running totals, averages, or rankings, which