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索引是个什么样的数据结构呢?
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索引是个什么样的数据结构呢?
索引的数据结构和具体存储引擎的实现有关, 在MySQL中使用较多的索引有Hash索引,B+树索 引等,而我们经常使用的InnoDB存储引擎的默认索引实现为:B+树索引。
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