A FOT index is an index that is similar to a B-Tree index, but an FOT index has multiple root nodes and fewer levels. (B-Tree indexes have only one root node and more levels.)
FOT索引类似B -Tree索引，但它有多个根节点和较少的级(B - Tree索引只有一个根节点和更多的级)。
A FOT index is an index that is similar to a B-Tree index, but an FOT index has multiple root nodes and fewer levels. (B-Tree indexes have only one root node and more levels.)
FOT索引类似B -Tree索引，但它有多个根节点和较少的级(B - Tree索引只有一个根节点和更多的级)。
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