HIER_TOP returns the topmost ancestor of either all members of a hierarchy or a particular member. The hierarchy can be either level-based or value-based.
VARCHAR2
HIER_TOP ( [member_expression] [WITHIN] {DIMENSION dimension_id | HIERARCHY hierarchy_id} )
Identifies a single dimension member within the hierarchy used for the calculation. If this optional argument is specified, then the result does not vary across dimension members.
The dimension over which the values are calculated using the default hierarchy.
The hierarchy over which the values are calculated. If dimension_id is used instead, the default hierarchy is used.
This example returns the top member of the default hierarchy of the Time dimension.
HIER_TOP(DIMENSION "TIME")
| Time | Top |
|---|---|
| 2006 | TOTAL |
| Q1.06 | TOTAL |
| Q2.06 | TOTAL |
| Q3.06 | TOTAL |
| Q4.06 | TOTAL |
| JAN-06 | TOTAL |
| FEB-06 | TOTAL |
| MAR-06 | TOTAL |
| APR-06 | TOTAL |
| MAY-06 | TOTAL |
| JUN-06 | TOTAL |
| JUL-06 | TOTAL |
| AUG-06 | TOTAL |
| SEP-06 | TOTAL |
| OCT-06 | TOTAL |
| NOV-06 | TOTAL |
| DEC-06 | TOTAL |
The next example returns TOTAL, which is the top member for Europe in the default hierarchy of the Customer dimension.
HIER_TOP('EMEA' WITHIN DIMENSION CUSTOMER)