Your question is Owning a Query Performance Incident. Take a moment with it on the right.
Talk me through your thinking if you like. When you're confident, submit your answer and I'll grade it like a real screen (7/10 or better passes).
Tell me about a time you had to lead the response to a serious SQL performance problem, such as a slow-running query or database bottleneck affecting a delivery, client commitment, or production workload. How did you diagnose the issue, align stakeholders, and drive it through to resolution?