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

Microsoft’s Bradley Ball dives into the inner workings of SQL Server indexing to help developers and DBAs speak the same ...

You'll notice if you turn on the execution plans for your queries in query analyzer that any operation which uses a non-clustered index has a secondary "bookmark lookup" step which actually ...

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.