How to write Top-N per group queries

How to write Top-N per group queries

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, dbms, topic-specific, database

参考答案摘要

One common approach is using window functions like ROW_NUMBER() with PARTITION BY. This allows ranking rows within each group and then filtering the top N rows. Another approach is using a correlated ...

本题提供 STAR 原则详细解答和技术解析，登录匠人学院学习中心即可查看完整答案。