How do you compute an account running balance that resets when a new month starts?

Problem Statement

Explanation

Partition the window by account and the month key so the cumulative sum restarts for each month. Order by transaction time and add a stable id as a tie breaker. This produces a per-month running total without extra joins or procedural loops.

Code Solution

SolutionRead Only

SUM(amount) OVER (
  PARTITION BY account_id, date_trunc('month', txn_time)
  ORDER BY txn_time, id
  ROWS BETWEEN UNBOUNDED PRECEDING AND CURRENT ROW
) AS month_running_balance

Practice Sets

This question appears in the following practice sets:

Window Functions & Analytics

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How do you compute an account running balance that resets when a new month starts?

Problem Statement

Explanation

Code Solution

Practice Sets

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How do you compute an account running balance that resets when a new month starts?

Problem Statement

Explanation

Code Solution

Practice Sets

Related Questions

Which SQL statement retrieves all columns and rows from a table named employees?

Which clause filters rows before aggregation and affects which rows are grouped?

What is the default sort order when ORDER BY is used without ASC or DESC?

Which construct is commonly used to paginate results in SQL engines like Postgres and MySQL?

Which predicate correctly checks for missing values in standard SQL?

More from SQL & Databases

Master Interviews
Anywhere, Anytime