About Refresh Groups

When it is important for two or more materialized views to be transactionally consistent with each other, you can organize them into refresh groups. By refreshing a refresh group, you can ensure that the data in all of the materialized views in the refresh group correspond to the same transactionally consistent point in time. A materialized view in a refresh group still can be refreshed individually. However, doing so nullifies the benefits of the refresh group because refreshing the materialized view individually does not refresh the other materialized views in the refresh group.