Updated: March 2, 2016
Returns the first child of the parent of a member.
A valid Multidimensional Expressions (MDX) expression that returns a member.
The following query returns the first sibling of fiscal year 2003 in the Fiscal hierarchy, which is Fiscal Year 2002.
SELECT [Date].[Fiscal].[Fiscal Year].&.FirstSibling ON 0 FROM [Adventure Works]