DBA_ADDM_FDG_BREAKDOWN describes the contribution for each finding from the different instances. There is one row for each finding and for each instance participating in the analysis. Rows are omitted if the impact from that instance is not sufficient to register a finding in a local ADDM analysis.
USER_ADDM_FDG_BREAKDOWN describes the contribution for each finding from the different instances owned by the current user.
Identifies the task to which this finding belongs (see DBA_ADVISOR_TASKS)
Identifies the finding (see DBA_ADVISOR_FINDINGS)
The number of the instance contributing to the finding
The database time, in microseconds, accumulated by this instance during the analysis period
The average number of active sessions of the finding in this instance
The percentage of contribution from this instance compared to the total impact of the finding