MySQL 数据库删除表中重复数据

方法一

# 保留主键 ID 较小的那条记录
DELETE n1 FROM names n1, names n2 WHERE n1.id > n2.id AND n1.name = n2.name

# 保留主键 ID 较大的那条记录
DELETE n1 FROM names n1, names n2 WHERE n1.id < n2.id AND n1.name = n2.name

方法二

参考链接：

1. Delete all Duplicate Rows except for One in MySQL? [duplicate]

MySQL 数据库删除表中重复数据

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