Implementing Siebel Business Applications on DB2 UDB for z/OS > About Migrating a Siebel Database to Unicode Format >
Differences Between ASCII, EBCDIC and Unicode Sort Order
The EBCDIC, ASCII, and Unicode encoding systems each use a different sort order for numbers, upper case alpha characters, lower case alpha characters, and special characters. As a result, if you load a partitioned table based on these characters, rows can be assigned to different partitions in the target table than they were in the original ASCII or EBCDIC source table, which might lead to unbalanced partitions in your database. You must determine if the partitioning keys need to be reevaluated when you migrate to Unicode.