Types and options | Grafana Labs
grafana.com › docs › grafanaThe labels to fields transformer is internally two separate transformations. The first acts on single series and extracts labels to fields. The second is the merge transformation that joins all the results into a single table. The merge transformation tries to join on all matching fields. This merge step is required and cannot be turned off.
Alert groups | Grafana Labs
grafana.com › unified-alerting › alert-groupsClick Alert grouping to open the page listing existing groups. From the Alertmanager drop-down, select an external Alertmanager as your data source. By default, the Grafana Alertmanager is selected. From custom group by drop-down, select a combination of labels to view a grouping other than the default.