合并扫描联接也被称为排序合并联接。

Merge scan join is also known as a sorted merge join.

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一个合并联接总是涉及一个或多个Equal联接谓词。

A merge scan join always involves one or more Equal join predicates.

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然而，如果断言中使用的值为0，那么内嵌循环联接可能是最优选择，而不是合并联接。

However, if 0 is used in the predicate, a nested-loop join would be the optimal choice instead of merge join.

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