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Roadmap to becoming a developer in 2022
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developer-roadmap/content/roadmaps/101-backend/content/107-nosql-databases/101-column-databases.md

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Column Databases

A columnar database is a database management system (DBMS) that stores data in columns as opposed to rows. The main advantage of columnar databases over row-oriented ones is their faster performance; this is due in large part to them accessing less memory to output data. This column structure can store more data in a smaller amount of memory. And because the initial data retrieval is done on a column-by-column basis, only the columns that need to be used are retrieved. This grants columnar databases like Cassandra DB their ability to scale efficiently and handle large amounts of data.