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Welcome to contoso.se! My name is Anders Bengtsson and this is my blog about Azure infrastructure and system management. I am a senior engineer in the FastTrack for Azure team, part of Azure Engineering, at Microsoft.  Contoso.se has two main purposes, first as a platform to share information with the community and the second as a notebook for myself.

Everything you read here is my own personal opinion and any code is provided "AS-IS" with no warranties.

Anders Bengtsson

MVP
MVP awarded 2007,2008,2009,2010

My Books
Service Manager Unleashed
Service Manager Unleashed
Orchestrator Unleashed
Orchestrator 2012 Unleashed
OMS
Inside the Microsoft Operations Management Suite

Counting Devices

Today I would like to quickly share two queries. The first query counts number of devices that sent a heartbeat last month. The second query shows the number of devices sent heartbeat per month, for the current year.

let LastMonthEndDate = (startofmonth(now()) - 1h);
let LastMonthStartDate = startofmonth(LastMonthEndDate);
Heartbeat
| where TimeGenerated between(LastMonthStartDate .. (LastMonthEndDate))
| distinct Computer
| summarize ['Devices Last Month'] = count()

let YearStartDate = (startofyear(now()) - 1h);
Heartbeat
| where TimeGenerated between(YearStartDate .. (now()))
| extend Month = (datetime_part("month", TimeGenerated))
| summarize Devices = dcount(Computer) by Month

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