# Number each transaction within its user, ordered by transaction_date from earliest to latest

Canonical URL: <https://datadriven.io/problems/number-each-transaction-within-its-user-ordered-by-transact-4e61fae7>

Domain: SQL · Difficulty: medium

## Problem

Number each transaction within its user, ordered by transaction_date from earliest to latest. Show user_id, transaction_id, transaction_date, and the row number as txn_number.

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