Windows and Frames
Explore how PostgreSQL window functions operate with windows and frames to enable advanced data analysis. Understand frame definitions, default behaviors, and how to manipulate data partitions for computations like sums and ratios within a single query.
We'll cover the following...
We'll cover the following...
There was SQL before window functions, and there is SQL after window functions: that’s how powerful this tool is!
The whole idea behind window functions is to allow us to process several values of the result set at a time: we see through the window some peer rows, and we’re able to compute a single output value from them, much like when using an aggregate function.
Windows and frames
PostgreSQL comes ...