Now that we know how Postgres [intlink id='pg-phriday-in-the-window']window functions work[/intlink], why not play with them a bit to get a better understanding of their capabilities? So long as we understand window functions are applied after data gathering and aggregation steps, much of their mystery and complexity is defanged. Let’s start actually using them for stuff![caption id="attachment_1396" align="aligncenter" width="480"] Captain Murphy is tired of your nonsense[/caption]
I’ll be the first to admit that I found Postgres window functions fantastically confusing when I first encountered them. They’re a powerful and versatile tool for building reports and summaries, but that functionality hides behind a fairly steep learning curve. One of the ways to combat their inherent complexity is to fully explore how they work, instead of just trying to wrap our heads around the expected results.