This figure shows the causes of data changes using a hierarchical stack of boxes on three levels. Centered at the top of the figure is a box labelled "System Downtime." This box is connected to two more boxes on the second (lower) level labelled "Unplanned Downtime" to the left, and "Planned Downtime" to the right. The "Planned Downtime" box is connected to two boxes on the third level labelled "Data Changes" and "System Changes."

The "Planned Downtime" box is connected to two more boxes on the third level, labelled "Data Changes" and "System Changes." The Data Changes box is the focus of this graphic and of the surrounding text. In the graphic, all of the boxes are unshaded except for the "Data Changes" box and the three boxes that hang off of the Data Changes box: Online Schema and Data Reorganization, Partitioned Tables and Indexes, and Dynamic Resource Provisioning.

End of figure description.