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The Accumulator

A hard SQL mock interview question on DataDriven. Practice with AI-powered feedback, real code execution, and a hire/no-hire decision.

Domain
SQL
Difficulty
hard
Seniority
L4

Interview Prompt

The FinOps dashboard needs a daily cloud cost time series with a running cumulative total so stakeholders can see how spending accumulates through the billing period. Show each billing date, its daily spend, and the cumulative spend through that date.

Summary

A total that builds row by row. Structure the query to match.

How This Interview Works

  1. Read the vague prompt (just like a real interview)
  2. Ask clarifying questions to the AI interviewer
  3. Write your sql solution with real code execution
  4. Get instant feedback and a hire/no-hire decision

Related

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  • SQL Interview Questions
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