SQL Server supports heaps (tables w/o clustered indexes) on which indexes point directly to the referenced row. It's nice that they allow you to choose between

SQL Server supports heaps (tables w/o clustered indexes) on which indexes point directly to the referenced row. It's nice that they allow you to choose between those and tables with clustered indexes where any secondary index references the primary key. See https://msdn.microsoft.com/en-us/library/hh213609.aspx https://msdn.microsoft.com/en-us/library/hh213609.aspx