Dataford
Interview QuestionsInterview GuidesExperiencesMock InterviewsPricing
Get started
SQL for Active Incidents
00:00
5 left

SQL for Active Incidents

MediumSQL · PostgreSQL

Problem

Write a SQL query using complex joins and aggregations to count active incident records across multiple tables based on specific regional criteria.

Use incidents created during January 2026, where active status means triggered or acknowledged. Include only the regional codes us-east, eu-west, and ap-southeast, and require the assigned team to be active.

Output

  1. One row per qualifying region, including regions with zero matching incidents
  2. Columns: region_code, region_name, and active_incident_count
  3. Sort by region_code ascending

Schema

regions
ColumnTypeDescription
region_idPKINTUnique region identifier
region_codeVARCHAR(30)PagerDuty region code
region_nameVARCHAR(100)Human-readable region name
teams
ColumnTypeDescription
team_idPKINTUnique response team identifier
team_nameVARCHAR(100)Response team name
region_idINTRegion assigned to the team
is_activeBOOLEANWhether the team currently handles incidents
services
ColumnTypeDescription
service_idPKINTUnique PagerDuty service identifier
service_nameVARCHAR(120)PagerDuty service name
owning_team_idINTTeam that owns the service
incidents
ColumnTypeDescription
incident_idPKINTUnique incident identifier
service_idINTService associated with the incident
assigned_team_idINTTeam currently assigned to the incident
statusVARCHAR(30)Incident lifecycle status
created_atTIMESTAMPIncident creation timestamp
priorityVARCHAR(10)Incident priority
Tablesregionsteamsservicesincidents
Interviewer

Your question is SQL for Active Incidents. Start with the requirements and the four tables in the Question tab.

Run and submit as often as you like. When you're ready, talk me through your approach or go straight to the code.

You need to log in / sign up to run or submit.
CodePostgreSQL
You need to log in / sign up to run or submit.Ln 1
Run your query to see results here.