Therefore, DB2 can use a DOUBLE index for faster join processing.

因此，DB 2可以使用DOUBLE索引用于快速连接处理。

youdao

This join method is usually used when no index is available on the join columns for the joining tables.

当连接表的连接列上没有可用索引时，通常使用该连接方法。

youdao

The result set from FETCH (3) is ordered by the ID column and joined using a merge join with index I1 for T1 to get final result set.

FETCH(3)的结果集是根据ID字段排序的，并且使用T1的索引I1的合并联接而得到最终的结果集。

youdao

He spent much of his life doing generous things, but just enough doing reckless things to join the long index of scandals and self-destruction in untold Kennedy histories to come.

CNN: Tragedy Strikes Again