This function returns a member.
Syntax and Details
member_expression is an expression that returns a member.
This expression cannot refer to a measure.
This function examines all the children of the parent of the given member, and returns the first member of that set (considering the default order of that set).
This function can return the same member that you specify as an argument (if that member is the first sibling).
SELECT MEASURES.[%COUNT] ON 0, birthd.[Mar 2003].FIRSTSIBLING ON 1 FROM patients Patient Count Jan-2003 10