这个问题我以前没遇到过，也是最近用MySQL数据库的时候才发现的问题，然后查询资料，最后总结如下：1、处理重复数据1.1 处理重复行SELECT your_column, COUNT(*) FROM your_table GROUP BY your_column HAVING COUNT(*) > 1;1.2 删除重复行WITH DuplicateCTE AS ( SELECT your_column, ROW_NUMBER() OVER (PARTITION BY your_column ORDER BY your_column) AS row_num FROM your_table ) DELETE FROM DuplicateCTE WHERE row_num > 1;2、规范化数据格式2.1 更改大小写：将列值转换成大写UPDATE your_table SET your_column = UPPER(your_column);2.2 去除空格：去除前导和尾随空格UPDATE your_table SET your_column = TRIM(your_co
mindev
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