Tech Talk

Tech Talk

All, None, and One: The SQL Left Join Trick

PagerDuty released Multi-User Alerting in early 2014, which allowed notifying and assigning multiple people when an incident is triggered. In addition to assigning multiple users to an incident, multi-user alerting also makes it possible for an incident to have multiple acknowledgers. This post will demonstrate the changes we made to our data model to implement multi-user alerting and the resulting sophistication added to our SQL queries to maintain their performance.

Kenneth Rose

10 min read

incidents, SQL