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A medium SQL interview practice problem on DataDriven. Write and execute real sql code with instant grading.

Domain

SQL

Difficulty

medium

Problem

Growth wants to quantify how much revenue the 2026 signup cohort has generated. Sum all transaction spending for users who signed up during calendar year 2026 and return a single total.

Practice This Problem

Solve this SQL problem with real code execution. DataDriven runs your SQL queries against a live PostgreSQL database and grades it instantly.