This makes DB2 queries use table scans instead of index scans and degrades database performance.

这使得DB 2查询使用表扫描代替索引扫描，并降低了数据库的性能。

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Physical database design includes table design, index design, materialized query table design, and the design of the other physical database objects.

物理数据库设计包括表设计、索引设计、物化查询表设计，以及其他物理数据库对象的设计。

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That results in a database selection wizard, wherein you allowed to choose the database where you want to perform various checks, namely database, data, index, logs, and space checks.

这会打开数据库选择向导，可以在此向导中选择要执行各种检查的数据库，比如数据库、数据、索引、日志和空间检查。

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