将丰富的业务逻辑构建到存储过程和高性能查询中的企业，现在可以使用DWS立即将它们放到SOA环境中。

Enterprises that have built rich business logic into their stored procedures and high-performance queries now have the capability to instantly make them available in an SOA environment using DWS.

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如上所述，性能是查询调优中主要关心的问题。

As stated above, performance is the major concern in query tuning.

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通常，使用索引可以改善查询性能。

Indexes are commonly used to improve query performance.

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