What causes duplicate rows after a JOIN, and how to fix it

What causes duplicate rows after a JOIN, and how to fix it

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

Duplicate rows usually appear when one row in a table matches multiple rows in another table. This often happens in one-to-many relationships, like customers and orders. SQL is doing the correct thing...

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。