|Oracle9i OLAP User's Guide
Release 2 (188.8.131.52)
Part Number A95295-02
A parent-child dimension table is one in which the hierarchical relationships are defined by a parent column and a child column. Since the hierarchy is defined by the relationship between the values within two columns, a parent-child dimension is sometimes referred to as having a value-based hierarchy.
Figure 25-1, "Sample Parent-Child Dimension Table Columns" illustrates the relationships between the values in the child and parent columns. A description column, which is an attribute of the child, is also included.
CHILD PARENT DESCRIPTION ------------- ----------- ------------- World World USA World United States of America Northeast USA North East Region Southeast USA South East Region MA Northeast Massachusetts Boston MA Boston, MA Burlington MA Burlington, MA NY Northeast New York State New York City NY New York, NY GA Southeast Georgia Atlanta GA Atlanta,GA Canada World Canada
If you choose to create OLAP Catalog metadata to represent a parent-child dimension, set the
solved_code for the hierarchy to
SOLVED,VALUE_BASED, as described in Chapter 20, "CWM2_OLAP_HIERARCHY".