• From http://msdn.microsoft.com/en-us/library/ms174979.aspx:

    SPARSE

    Indicates that the column is a sparse column. The storage of sparse columns is optimized for null values. Sparse columns cannot be designated as NOT NULL. For additional restrictions and more information about sparse columns, see Use Sparse Columns.

    If a sparse column cannot be designated as NOT NULL, is there a NULL/NOT NULL property to be transferred or does making the column SPARSE automatically make the column NULLable? Or does a SPARSE column have a NULL property that just cannot be changed to NOT NULL? Just wondering... :unsure: