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NMSQL中分为两种索引:聚簇索引(clustered index)和次要索引(secondary index)。这两种索引都是一种差不多的B+树。
一张表有且只有一个聚簇索引,也就是只有一个主键(虽然主键是一个逻辑上的概念,这里先这么叫)。主键会决定了数据的真实存储位置。次要索引可以有很多,不会影响数据的实际存储位置。
dbengine使用B+Tree接口的时候需要注意以下几点:
@osmium18452
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Roger
osmium18452
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NMSQL中分为两种索引:聚簇索引(clustered index)和次要索引(secondary index)。这两种索引都是一种差不多的B+树。
一张表有且只有一个聚簇索引,也就是只有一个主键(虽然主键是一个逻辑上的概念,这里先这么叫)。主键会决定了数据的真实存储位置。次要索引可以有很多,不会影响数据的实际存储位置。
dbengine使用B+Tree接口的时候需要注意以下几点:
@osmium18452
The text was updated successfully, but these errors were encountered: