Therefore, we give our temporal query language GTSQL, where its syntax is given.
GTSQL便是我们提出的一个时态查询语言。本文给出了GTSQL的主要语法。
Additionally, visual efficiency of dynamic spatial variation has been improved by reasonable resource arrangement, high effective spatial-temporal query and dynamic cache mechanism.
通过合理的资源调配、高效时空索引和动态缓存机制来提高空间变化过程动态可视化的效率。
In a user defined time interval, the predictive continuous range query continuously returns moving objects that will appear in a spatial query range during a future temporal query interval.
预测性连续时空区域查询在用户指定的时间范围期间持续地返回给定未来查询时间范围期间将出现在查询区域的移动对象。
Simplifying the application design, by removing the need to store some kinds of temporal data. By using a Flashback Query, you can retrieve past data directly from the database.
移除某些因需求储存的暂时数据以简化应用设计。通过闪回查询你可以从数据库中直接获取到过去的数据。
However, traditional XML indexes don't do a good job in improving the query efficiency of temporal XML documents. Consequently, it is essential to introduce some special indexing technology.
对于提高时态XML文档上的查询效率，传统的XML索引并不是很有效，可以说时态XML还缺乏一些专用的索引技术。
In temporal XML index areas, most of them generate a new version when updating temporal XML document and need to traverse different versions to complete query processing.
在时态XML索引领域，较多是在时态xml文档更新时产生一个新版本，需要遍历不同的版本才能完成查询处理，影响查询处理性能。
In order to implement a temporal database management system, we have to set up a query language for the data model.
为了实现时态数据库管理系统，除了数据模型之外，还需要有一个时态数据库的查询语言。
In order to implement a temporal database management system, we have to set up a query language for the data model.
为了实现时态数据库管理系统，除了数据模型之外，还需要有一个时态数据库的查询语言。
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