Note: the query optimizer considers using a functional index when the index expression is used in a relational expression or as an argument to one of the operator class functions.
注意：当索引表达式被用于关系表达式，或作为某个操作符类函数的参数时，查询优化器将考虑使用函数索引。
Update 14 USES the relational column value "CID" in the transform expression to produce a new element "customerid" as the first element under the root element "customerinfo."
更新14在转换表达式中使用关系列“CID”生成新元素“customerid”并让它成为根元素“customerinfo”下的第一个元素。
To do this, an XPath expression is used to identify the portion of the XML data, normally a specific XML text node, that returns each relational data value.
为此，需使用一个XPath表达式来识别由XML数据组成的部分，通常为一个特定的XML文本节点，它会返回所有关系数据值。
When using a DMR package in Dynamic Query Mode, a report that contains an expression with any vendor specific relational function will produce an error message similar to the following.
在DynamicQueryMode中使用dmr包时，如果报告包含的表达式带有特定于供应商的关系函数，那么执行报告将会生成以下的错误消息。
In this paper, a method of lattice transformation is introduced to demonstrate the relational expression between Miller indices and interplanar spacing in base-centered monoclinic lattice.
采用晶格变换的方法证明了在底心单斜格子中密勒指数与晶面间距的关系式。
The credibility of the relational expression is checked using 174 liquefaction and non-liquefaction case histories, which proves the expression has a correct rate of 71.2%.
用174个现场液化勘察资料对该式的可靠性进行了检验，结果表明：该式的判别正确率可以达到71.2%。
A simple relational expression can be obtained by calculating results, and can predict breakthrough time.
通过计算结果可以得到简单的关系式，能够预测突破时间。
The paper introduces an Extended Relational Model Database System ERDB and a GIS based on ERDB. We mainly discuss the problems of expression of topology in GIS and recursive query.
本文介绍了一个扩展关系模型数据库系统ERDB和在该系统之上开发的一个GIS系统。
The paper introduces an Extended Relational Model Database System ERDB and a GIS based on ERDB. We mainly discuss the problems of expression of topology in GIS and recursive query.
本文介绍了一个扩展关系模型数据库系统ERDB和在该系统之上开发的一个GIS系统。
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