A global partitioned index is prefixed if it is partitioned on a left prefix of the index columns.A global partitioned index is nonprefixed if it is not partitioned on a left prefix of the index columns. Oracle does not support global nonprefixed partitioned indexes. See Figure 3-6 for an example.
Global prefixed partitioned indexes can be unique or nonunique. Nonpartitioned indexes are treated as global prefixed nonpartitioned indexes.