Description of the illustration dwhsg137.png

This image illustrates zone maps for a partitioned fact table. On the left, placed one below the other, are two rectangles representing the partitions P1 and P2 of the Fact Table SALES. The partition P1 is divided into three parts labeled Z1, Z2, and Z3. The partition P2 is divided into two parts labeled Z4 and Z5. On the right is a rectangle representing the zone map table SALES_ZMAP which is divided into seven parts labeled in the following order (from top to bottom): Z2, Z3, Z5, Z4, Z1, P1, and P2.