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I found in a features table for SQL Server 2005 a row named "Star query optimization" but it is not explained anywhere.

Could this be a feature that optimizes a query like :

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up vote 1 down vote accepted

It's a business intelligence feature, allowing the query planner to make better decisions when performing queries on star schema style databases, typically used in business intelligence / data warehouse implementations.

Some sparse background is available in this blogs.msdn.com post, but the article they link to for deeper information is gone.

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