Aiming at the problem of evolution of multidimensional schema structure of data warehouse, a multi-version data warehouse model is proposed, and the definition of model structure, model objects and assignment relationship between objects is given. Multi-version data warehouse manages the multidimensional schema of data warehouse based on the \"version control\" strategy, and saves each valid state in the evolution process of data warehouse in the form of version. Decision makers can analyze historical data in a specific structural version, which is conducive to a more accurate grasp of business facts. Keywords: data warehouse version; schema version; instance version; version evolution
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