Fading Coder

This article examines the implementation of aggregate functions and the HAVING clause in PostgreSQL from a source code perspective. We'll explore how PostgreSQL processes SQL queries containing aggregate operations through its execution pipeline. The PostgreSQL query processing pipeline consists of...

The objective is to compute the completion rate for each video that had play activity in 2021, rounded to three decimal places, and order the results in descending order. The completion rate is defined as the proportion of plays where the viewing duration was greater than or equal to the video's len...