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1.5万字+30张图盘点索引常见的11个知识点
这里我假设每4条数据算一个组,图上就有3个组,组分好之后,mysql会取出每组中 最大的id 值,就是图中的4、8、12,放在一起,在数据页中找个位置存起来,这就是前面提到的数据页存储的额外信息之一,被称为 页目录 ...
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