# CRUD [TopNAggregation](../../../concept/data-model.md#topnaggregation) on the Web UI

## Get Top-N-Aggregation
When you in the `Measure` tab, you can view the list of top-n-aggregations in the specific group.

![top-n-get.png](https://skywalking.apache.org/doc-graph/banyandb/v0.7.0/web-ui/top-n-get.png)

## Create Top-N-Aggregation
You can create a new top-n-aggregation by clicking the right button of the mouse on the `Top-N-Aggregation` category and select the `new topn-agg` button.

![img.png](https://skywalking.apache.org/doc-graph/banyandb/v0.7.0/web-ui/top-n-add.png)

## Update/Delete Top-N-Aggregation
You can click the `edit topn-agg/delete` button on a specific top-n-aggregation to modify/delete the top-n-aggregation:

![top-n-edit.png](https://skywalking.apache.org/doc-graph/banyandb/v0.7.0/web-ui/top-n-edit.png)