DB2 9 & 10 for z/OS Overview

Migration Planning WorkshopMore OLAP Specifications• Moving Sum and Moving Average– New DB2 10 NFM specifications (aggregate functions) that compute asingle value for the current row based on some or all the rows in a definedgroup.– Supports cumulative sums and moving averages by using a window.– A window can specify three optional components:• Partitioning of the result table using PARTITION BY clause (in DB2 9).• Ordering of rows within a partition using ORDER BY clause (in DB2 9).• Aggregation group by using ROW or RANGE clause• Two mandatory components need to be specified for an aggregation group.– Keyword ROWS to indicate a physical group … or– Keyword RANGE to indicate a logical group … and– The starting and ending row of the aggregation group– Cannot be used within an XMLQUERY, XMLEXISTS, or as an argument ofan aggregate function.– New -20117 SQL code to indicate an invalid window specification.34© 2011 IBM Corporation