exception aggregation at data base level

Hi All

As we know we can do exception aggregation at query level for special analysis,  but when we defined exception aggregation at query it will take more time to display output so leads to poor query performance.

1.so question is that it is possible to define exception aggregation at database level? if yes how can we define?

2. if it's allowed to define at data base level , is it stored physically at data base level as normal kf?

Thanks

Bhaskar