Retrieving Distinct Count of the PageViews in Application Insights using parseurl

Had a query from a partner today about how they could get a report from Application Insights to tell them how many times a particular App Service had been called. The sticking point was to group all of the hits to a particular instance irrespective of the full url that was being retrieved.

We built this up slowly to find out the syntax of what was being expected

// Create a table with a query
let recentReqs = pageViews | where timestamp > ago(30d);
// select one column into a new table
let recentHosts = recentReqs | project parsejson(parseurl(url))["Host"];
recentHosts | summarize count() by tostring(Host)

Once we had this working, we knew we could simplifying this into

| where timestamp > ago(30d)
| summarize count() by tostring(parsejson(parseurl((url))["Host"]))

Hope this helps someone!

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