Which practice most often speeds large running-window computations?

Problem Statement

Explanation

When the scan order matches an index, less sorting is needed and the window can stream. ROWS frames keep work bounded to exact row counts instead of peers. Materialization and DISTINCT can add unnecessary sorts and memory usage unless required by logic.

Code Solution

SolutionRead Only

CREATE INDEX idx_sales_pid_day ON sales(product_id, day);
-- then order by (product_id, day)

Practice Sets

This question appears in the following practice sets:

Window Functions & Analytics

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Which practice most often speeds large running-window computations?

Problem Statement

Explanation

Code Solution

Practice Sets

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Master Interviews Anywhere, Anytime

Which practice most often speeds large running-window computations?

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