ClickHouse is a highly scalable, column-oriented, relational database management system optimized for analytical workloads. It is an open-source product developed by Yandex, a search engine company. One of the key features of ClickHouse is its support for advanced analytical functions, including windows functions.

Windows functions were first introduced in the late 1990s by SQL Server, and since then, have become a standard feature in many relational databases, including ClickHouse. Today, windows functions are an indispensable tool for data analysts and developers and are widely used in many industries.

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