DB2 Version 7.2 allows you to update the columns in a partitioning key. (A partitioning key exists only in a table spread over multiple database partitions.) Before DB2 Version 7.2, if you wanted to change the partitioning key, you needed two steps:
With DB2 Version 7.2, this can be done in one step with an update statement. In an online transaction processing (OLTP) environment, updateable partitioning keys provide performance improvements in data redistribution.