Northwind runs a help desk for its software. Each row of Northwind Help Desk is one ticket from 2025: when it came in and when it closed, the channel, priority, product area, team and agent, how long the first response took, and the customer's satisfaction score.
Some fields are empty on purpose. Open tickets have no Closed Date, and many customers never rate their ticket, so Satisfaction is blank for them. Averages simply skip the blanks.
Each task names the chart to build. To count tickets, use Ticket ID with Measure > Count.