-Clustered indexes may outperform clustered columnstore tables when a single row needs to be quickly retrieved. For queries where a single or very few row lookup is required to performance with extreme speed, consider a cluster index or nonclustered secondary index. The disadvantage to using a clustered index is that only queries that benefit are the ones that use a highly selective filter on the clustered index column. To improve filter on other columns a nonclustered index can be added to other columns. However, each index which is added to a table adds both space and processing time to loads.
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