If DB2 used a single index range scan from 20 to 30, it would miss this document and return an incomplete query result.

如果DB 2在20到30之间使用单个索引范围扫描，则会错过该文档，并返回不完全的查询结果。

youdao

If your intention is a real "between" predicate, then the execution plan on the right is much better, because a single range scan with a start-top predicate delivers the matching row IDs only.

如果您的目的是要实现真正的“between”谓词，则右侧的执行计划会更好一些，因为带有启动谓词的单个范围扫描仅传递匹配的行id。

youdao

This scan USES only subsets of the full range of a composite index.

这种扫描只使用完整复合索引的子集。

youdao

First, a scan at a range of 8 metres generated a 3D model.

ECONOMIST: Monitor

Teusink adds that the prototype slide hijacker he built has a range of only 30 feet, but that other publicly available hardware would allow a hacker to scan for wireless presenters within a full kilometer.

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