无论公开的是应用程序服务，还是生成的简单数据查询服务，产生的数据对于业务上下文必须是准确和适当的，这样才能提供数据的价值。
Whether it is application services being exposed or a simple generated data query service, the resulting data must be accurate and appropriate to the business context to be of any value.
准确的索引信息和统计信息是查询优化器中基于成本的决策的基础。
Accurate index information and statistics are fundamental to cost-based decisions in the query optimizer.
本文的使用查询注释的案例研究部分描述了如何确定估计是否准确。
The a case study using query annotation section of the article describes how you can determine if the estimate is accurate.
为了获得准确的结果并提供与业务用户有关的信息，报表管理器能够对应用于每个查询的过滤器实施精细控制。
In order to obtain accurate results and provide the information pertinent to the business user the report manager has the ability to exercise fine control over the filters applied to each query.
优化器凭借精确的基数估计值来准确计算出每一个待定查询访问计划的成本。
The optimizer is dependent on accurate cardinality estimates to properly compute the cost of each query access plan considered.
优化器凭借精确的基数估计值来准确计算出每一个待定查询访问计划的成本。
The optimizer depends on accurate cardinality estimates to properly compute the cost of each query access plan considered.
因此，如果统计数据不准确或者过期，或者冲突，优化器会对查询计划中各步骤的成本评估不准确，从而导致糟糕的性能。
Consequently, if the statistics are inaccurate, outdated, or conflicting, the optimizer will create inaccurate estimates for the costs of the steps in a query plan, leading to poor performance.
只要有可能，建议使用索引定义和查询中所需元素或属性的准确路径，而不使用通配符。
Wherever possible, it is recommended to use the exact path to the desired elements or attributes in index definitions and queries, without wildcards.
如果有了准确的统计信息，那么查询优化器一般能够得出正确的选择性估计。
Given accurate statistics, the query optimizer generally comes up with correct selectivity estimates.
当查询性能中出现例外情况时，优化指南和统计视图特性对于弥补访问计划估计的不准确性非常有用。
Optimization guidelines and statistical views are useful features to compensate the access plan evaluations when exceptions in query performance occur.
注意，修改查询的建议基于DB 2编目统计数据是准确的这一假设。
Note that recommendations for changing queries are based on the assumption that the DB2 catalog statistics are accurate.
您还应该考虑在MQT 上执行runstats，以便查询优化器拥有关于 MQT 中的行数以及其他统计信息的准确信息。
You should also consider executing runstats on the MQT, so that the query optimizer has accurate information about the number of rows in the MQT and other statistics.
如果需要替换查询，Optim集成提供应用程序源代码中需要修改的准确位置。
If queries need to be replaced, Optim integrations provide the exact location in the source application where the change is required.
在Technical Note中描述的方法允许发布灵活准确的查询，可以包括WSDL相关信息和其它信息，例如产业分类。
The approach described in the Technical Note allows flexible and precise queries to be issued that can include both WSDL-related information and other information, such as industry classification.
为了确保优化器选择最佳的查询计划，使内部统计数据保持为最新并且最准确的十分重要。
To ensure that the optimizer selects the best query plan, it is important to keep internal statistics current and accurate.
因此，获得最佳计划的准确性完全取决于关于查询中所涉及的数据库对象的最新统计信息。
So, the accuracy of getting an optimal plan is entirely dependant on the up-to-date statistical information about the database objects involved in the query.
这样在决定缺陷的存在时，可以使随后的查询可以询问更多准确的问题（从而获得更多准确的答案）。
This allows the subsequent queries to ask much more accurate questions (and to obtain much more accurate answers) when determining the existence of vulnerabilities.
优化器的行为受三个关键因素的影响：Informix配置文件中OPTCOMPIND参数的值、查询命令和内部统计数据的准确性。
The behavior of the optimizer is influenced by three key factors: the value of OPTCOMPIND parameter in the Informix configuration file, query directives, and the accuracy of internal statistics.
许多XML查询很难用比XPath更清晰、更准确的方式来表达。
Many XML queries are hard to express in a clearer and conciser manner than with XPath.
在进行分布式数据库应用时，快速而准确的得到查询结果一直是分布式数据库得以应用的关键问题。
While Process application of the distribute database, fast and exact get the query result has been the key problem about distribute database.
在网格中要实现更加准确有效的服务发现、查询及其动态分配和替换，需要在语法匹配的基础上进一步实现语义匹配。
For better efficiency and accuracy, it needs semantic match between grid services to implement the service discovery, the service query, and the dynamic allocation and replacement of service.
优化了最佳线路算法，使路径查询更加快速准确。
Optimize the best route algorithm, so that path query more quickly and accurately.
认为该模型可充分利用XML文档的DTD模式信息，并能大幅度提高查询的准确率。
Taking full advantage of the DTD pattern information of the XML documents, the research model can significantly enhance the accuracy ratio of inquiries.
通过参考资料类网站、英语教学网站、网上英语论坛、英语搜索引擎等能更快、更准确地查询资料，有助于提高英语教学质量。
Teachers can find resources swiftly and accurately with the help of all kinds of websites, such as English teaching website, google etc. which can improve English teaching quality.
这样不仅能够使固定资产的管理更高效，还能使固定资产的查询更准确。
This will not only enable more efficient management of fixed assets but also make a more correct query.
其可以准确的记录历史信息，并提供一个强大的查询工具来分析信息。
Historical information can be held indefinitely, and there is a powerful query tool available to interrogate it.
查询也提供了其他节省时间的功能，提高了数据的准确性。
The query also offers other timesaving features to increase the accuracy of your data.
查询也提供了其他节省时间的功能，提高了数据的准确性。
The query also offers other timesaving features to increase the accuracy of your data.
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