Why should you include a tiebreaker column in the ORDER BY of window functions?

Problem Statement

Explanation

If two rows share the same sort key, the engine may return them in any order. Adding a stable tiebreaker like id keeps rankings and running totals deterministic. This prevents odd jumps in running metrics and inconsistent test results.

Code Solution

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ROW_NUMBER() OVER (ORDER BY created_at DESC, id DESC) AS rn

Practice Sets

This question appears in the following practice sets:

Window Functions & Analytics

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Why should you include a tiebreaker column in the ORDER BY of window functions?

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

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Why should you include a tiebreaker column in the ORDER BY of window functions?

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