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MYSQL表中没有主键,怎么找到重复的数据

掘金

About this offer

问题描述有一次遇到这样一个面试题,说如果一个表中没有主键,如何找到里面重复的数据? 表数据如下: 表结构如下: 针对以上问题,有以下几种解决方案解决方案 1. 使用 GROUP BY 分组查询法

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Provider: 掘金
Source: juejin-rss
Score: 57.37
Confidence: 54%

Source evidence

What RADAR observed and classified to build this opportunity. It is what the source published, not a verification that the offer is still active.

JuejinObserved: Oct 8, 2026Source reliability: 60%
MYSQL表中没有主键,怎么找到重复的数据. 问题描述有一次遇到这样一个面试题,说如果一个表中没有主键,如何找到里面重复的数据? 表数据如下: 表结构如下: 针对以上问题,有以下几种解决方案解决方案 1. 使用 GROUP BY 分组查询法
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MYSQL表中没有主键,怎么找到重复的数据

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RADARGood tools open new possibilities.Explore thoughtfully. Create freely.