What happens when the order of the index column is random?

当索引列的顺序是随机的时候，将会发生什么呢？

youdao

But what happens when the order of the index column is random?

但是如果索引列的顺序是随机的，将会发生什么呢？

youdao

Also, DB2 cannot use random order index columns as part of a sort merge join.

另外，DB 2无法在排序合并合并连接中使用随机顺序的索引列。

youdao

Doesn't this contradict his support for index funds in his book A Random Walk Down Wall Street?

FORBES: About Burton Malkiel

Your expected return with a large, random portfolio is identical to the return on the index.

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And then finally, the other thing I've always been a big believer in, and Forbes magazine has been a great supporter from the very beginning of my Random Walk book, and that is put your money in low-cost index funds.

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