How do you find orphan rows (orders without users)?

How do you find orphan rows (orders without users)?

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, sql, topic-specific, database

参考答案摘要

Orphan rows occur when records in one table reference entries that do not exist in another table. A common example is orders that do not have a matching user record. Identifying such rows is important...

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