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Five years ago I proposed a common database approach for transaction processing and analytical systems using a columnar in-memory database, disputing the common belief that column stores are not suitable for transactional workloads. Today, the concept has been widely adopted in academia and industry and it is proven that it is feasible to run analytical queries on large data sets directly on a redundancy-free schema, eliminating the need to maintain pre-built aggregate tables during data entrydoi:10.14778/2733004.2733074 fatcat:6vsabhyk6fa3vk7juntaeqwndy