Drills down the bottommost members of a set, at a specified level, to one level below.
If a numeric expression is specified, the DrilldownLevelBottom function sorts, in ascending order, the children of each member in the specified set, according to the specified value, as evaluated over the set of child members. If a numeric expression is not specified, the function sorts, in ascending order, the children of each member in the specified set, according to the values of the cells represented by the set of child members, as determined by the query context; This behavior is similar to the BottomCount and Tail (MDX) functions which return a set of members in natural order, without any sorting.
After sorting, the DrilldownLevelBottom function returns a set that contains the parent members and the number of child members, specified in Count, with the lowest value.
The DrilldownLevelBottom function is similar to the DrilldownLevel function, but instead of including all children for each member at the specified level, the DrilldownLevelBottom function returns the bottom-most number of child members.
Querying the XMLA property MdpropMdxDrillFunctions enables you to verify the level of support that the server provides for the drilling functions; see Supported XMLA Properties (XMLA) for details.
The following example returns the bottom three children of the Product Category level, based on the default measure.
SELECT DrilldownLevelBottom ([Product].[Product Categories].children, 3, [Product].[Product Categories].[Category]) ON 0 FROM [Adventure Works]