ClickHouse® vs PostgreSQL: Understanding the Differences Between OLAP and OLTP Databases One of the most common questions developers, data engineers, and architects ask when building data-intensive applications is: Should I use PostgreSQL or ClickHouse®? At first glance, both are powerful open-source databases used by organizations around the world. However, they were designed to solve fundamentally different problems. In Day 3 of my 100 Days of ClickHouse® challenge, I take a deep dive into the