How Can I merge/combine columns using bosun in Grafana?

Here is my data


And my table panel looks like the following pic now.

And my bosun query string is:

limit(sort(sum(q("sum:1d-sum-zero:one_metric_name.ee_http_sla_qps{method=*,httpCode=*,bizCode=*,stable=not_literal_or(1)}", "24h", "")),"desc"),20)

Question

How can I combine bizCode+httpCode+method+stable as one column named target and it will be with value column as my aim Table Panel

Help !