SingleStore has successfully unified transactions and analytics in a single database, challenging the long-held belief that these two functions require separate systems. By starting with an in-memory database, scaling out to distributed architecture, adding persistence and ACID transactions, and incorporating column stores for fast scans and aggregations, SingleStore has achieved a unified database that can execute both transactional and analytical workloads concurrently. The system's design prioritizes low latency for both reads and writes, high availability, durability, and scalability, making it suitable for modern data warehouses that need to scale to petabytes of storage and perform complex analytics on large datasets.