Explanation A nonclustered columnstore index enables real-timeoperational analytics in which the OLTP workload uses the underlying clustered index, while analytics run concurrently on the columnstore index. Columnstore indexes can achieve up to 100xbetter performance on analytics and data warehousing workloads and up to 10x better data compression than traditional rowstore indexes. These recommendations will help your queries achieve the very fast query performance that columnstore indexes are designed to provide. References: https://msdn.microsoft.com/en-us/library/gg492088.aspx