Non-clustered indexes can be numerous in SQL Server 2008 I remember from my Sybase days that SQL Server tables could support up to 255 indexes. One clustered index and 254 non-clustered indexes.

Non-clustered Columnstore Indexes (NCC Index) are also getting some enhancements in SQL Server 2016. The most notable of these enhancements is the ability to be updated.

Many SQL Server operations can often be made faster by taking advantage of effective clustered indexes. It should be understood that this combination of a non-clustered and clustered index on the same ...

If there are Key Lookup operators which are shown when looking at the execution plans, this tells you that index changes are needed to the non-clustered index which is being used by the query.

Découvrez les bases des index clusterisés et non clusterisés dans SQL, et quand utiliser chacun d’eux. Découvrez comment optimiser vos requêtes avec des exemples et des conseils.

Non-clustered Columnstore Indexes are also getting some enhancements in SQL Server 2016. The most notable of these enhancements is the ability to be updated.