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08. 删除重复海量数据

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Release： 2016-06-07 17:39:36
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重复数据，通常有两种：一是完全重复的记录，也就是所有字段的值都一样；二是部分字段值重复的记录。 一. 删除完全重复的记录 完全重复的数据，通常是由于没有设置主键/唯一键约束导致的。 测试数据： ) duplicate_all duplicate_all(c1 int ,c2 int ,c3 var

重复数据，通常有两种：一是完全重复的记录，香港服务器，也就是所有字段的值都一样；二是部分字段值重复的记录。

一. 删除完全重复的记录
完全重复的数据，通常是由于没有设置主键/唯一键约束导致的。
测试数据：

) duplicate_all duplicate_all ( c1 int, c2 int, c3 varchar(100) ) duplicate_all ,,,,,,,, ，网站空间，美国服务器

Related labels：
delete data Massive repeat
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