ReplacingMergeTree, SummingMergeTree, and AggregatingMergeTree: When to Use Each
The MergeTree variants are specialised versions of the base MergeTree engine that add specific behaviour during background merges, each solving a different data problem. If you have used the base MergeTree engine and started hitting situations where you need deduplication, pre-aggregation, or update-like behaviour, you are ready for the ClickHouse MergeTree variants. This post explains […]
Getting Started with ClickHouse: Your First Queries and Schema Design
This post walks you through installing ClickHouse, creating your first table, inserting data, and writing queries that actually return useful results fast. Reading about ClickHouse is one thing. Running your first query and seeing it return in milliseconds is another. By the end of this post, you will have a working ClickHouse table, real data […]
Essential SQL Queries Every Data Professional Should Know
In today’s data-driven world, the ability to extract, analyze, and interpret data has become an invaluable skill. Whether you’re making business decisions, identifying trends, or simply trying to make sense of vast amounts of information, understanding SQL (Structured Query Language) puts you in the driver’s seat of data analysis. As someone who has good knowledge […]