What are window functions in SQL? Explain ROW_NUMBER, RANK, and DENSE_RANK with examples.

What are window functions in SQL? Explain ROW_NUMBER, RANK, and DENSE_RANK with examples.

题目类型: 技术面试题

这是一道技术面试题，常见于澳洲IT公司面试中。

难度: medium

标签: interviewbit, data-analyst, topic-specific, data-analysis, analytics

参考答案摘要

Window functions perform calculations across a set of rows related to the current row without collapsing them into a single result. Unlike GROUP BY, which aggregates rows, window functions retain indi...

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