Une base de données orientée colonnes est un système de gestion de base de données (SGBD) qui stocke les tableaux de données par colonne et non par ligne.

ClickHouse® is an open-source column-oriented database management system that allows generating analytical data reports in real-time.

• https://github.com/ClickHouse/ClickHouse
• https://clickhouse.com/clickhouse
• https://clickhouse.com/docs

OLAP stands for Online Analytical Processing. It is a broad term that can be looked at from two perspectives: technical and business. At the highest level, you can just read these words backward:

• Processing — Some source data is processed…
• Analytical — …to produce some analytical reports and insights…
• Online — …in real-time.