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This SQL Server index design guide contains information and best practices to help you design effective indexes to meet the needs of your application.
You may have to experiment with several different designs before finding the most efficient index.
Poorly designed indexes and a lack of indexes are primary sources of database application bottlenecks.
Designing efficient indexes is paramount to achieving good database and application performance.
With the release of SQL Server 2012, Microsoft introduced the columnstore index, a memory-optimized column-oriented index geared toward data warehouse workloads.
Although columnstore indexes offered significant performance gains over their traditional counterparts, they were not without their limitations.