What are the primary differences between an index reorganization and an index rebuild?

索引重组和索引重建主要区别有哪些？

youdao

An index rebuild will always rebuild the entire index, regardless of the extent of fragmentation.

索引重建始终将重建整个索引，而无需考虑的碎片的程度。

youdao

Since each index (fragment) has its own UDI counter, the decision to skip or rebuild index statistics is done based on how much the index (fragment) has changed.

由于每个索引(片段)都有自己的udi计数器，因此将根据索引(片段)的修改程度判断是否跳过或是重建索引统计。

youdao

Does he shrink, rebuild, re-index and run other maintenance utilities on your databases like you should be doing?

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