Window Functions
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What is Window Functions?
Window functions in SQL perform calculations across a set of table rows that are related to the current row. Unlike aggregate functions that group rows into a single output row, window functions retain the individual rows while adding calculated values based on the window frame defined for each row. This allows you to compute things like running totals, moving averages, or rank values within a partition of your data without collapsing the original dataset.
Free resources to learn Window Functions
- Official docsSQL Roadmap
- ArticleSQL Window Functions
More in stage 21: SQL Fundamentals
Window Functions: common questions
Can I learn Window Functions in Hindi?
This lesson is written in English. Once you sign in, open it in the interactive course and ask the AI tutor to explain Window Functions in Hindi or Hinglish. The tutor answers from this lesson’s own text, so it stays on the syllabus, and it runs on your own Google, OpenAI or Anthropic key.
Is this Window Functions tutorial for beginners?
It is lesson 73 of 200 in the free BI Analyst roadmap, in stage 21, SQL Fundamentals. If you are new to BI Analyst, start from stage 1 and come back here in order; if you already know the earlier stages, this lesson stands on its own.