Transaction Timeline

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

Domain

SQL

Difficulty

medium

Problem

Finance wants a one-row-per-customer purchase snapshot for the lifetime-value model. For each user with at least one transaction, find their earliest and latest transaction_date and their total spending. Return the username and those three aggregates.

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