We focus on the research of query modification by applying security constraints.
本文重点研究了多级安全环境下，利用约束处理来实现查询处理的方法。
This section of the article will use several examples to demonstrate how query modification can be implemented.
文章的这个部分，使用几个例子，解释了怎样操作自定义查询。
The first step is to create a compatible regular expression out of each query word, although modification is only required if the word contains a wildcard character: *.
第一步是创建与每个查询词一致的正则表达式，只有在查询词包含通配符 * 时才需要修改。
You will have to determine whether the gains in query performance outweigh the affect to performance during data modification and in additional disk space requirements.
您应该确定修改数据时在查询性能上的提升是否超过了对性能的影响，以及是否需要额外的磁盘空间要求。
On the Web, the browser has to re-query the server to discover modification to the state of the application.
在Web上，为了发现对应用程序状态的修改，浏览器必须重新查询服务器。
Many functions have been realized in our database, for example, multi-aspect query, loading, modification, deletion, extraction of data, printing, backup and help.
数据库实现了多种操作功能：有多途径检索、录入、修改、删除、数据提取、打印、数据备份、帮助。
It can realize not only the data manipulating functions such as browsing, query, copy, output, adding, deletion, modification and renewing, but also spatiotemporal analysis.
系统具备了对数据的浏览、查询、复制、输出以及增加、删减、修改、更新等功能，还能对数据进行时空分析。
This system has realized the browse, edition, modification and maintenance of drag chain conveyors, and at the same time can still query and choose type.
该系统实现了埋刮板输送机数据库的浏览、编辑、修改与维护，同时还能实现查询与选型的工作。
These characteristics include objects, methods, inheritance, class library, durability, query, query optimization, integrity, concurrency, performance and schema modification.
这些特征包括：对象、方法、继承性、类库、持久性、查询、查询优化、完整性、并发性、性能和模式修改。
Desgned and implemented the data management of the patients 'cases, speech exercise results, exercise courses and exercise materials, including inputting, query, modification and printing etc.
设计与实现了患者病历数据、训练资料数据、言语训练课程数据、言语训练结果统计数据等的输入、查询、修改及统计打印等管理功能。
The system manages the engineering data by using the engineering database, which have the fundamental functions of real-time storage, real-time query, realtime modification.
本系统采用工程数据库管理数据，具有实时存储、实时查询、实时修改的功能。
The main function includes the query of tables structure and the modification of structure tables.
主要包括实现查看库表结构情况、修改表结构功能的设计思想和实现方法。
It provides the in-memory document modification capabilities of the document Object Model (DOM), and supports LINQ query expressions.
它提供文件物件模型(DOM)的记忆体中文件修改能力，而且支援LINQ查询运算式。
Provides steps for opening an existing query for modification.
提供打开现有查询进行修改的步骤。
The system realizes many functions such as query, adding, deleting, modification, report printing and so on. And these functions make alarm more concrete in form, and more effective in realization.
本文论述的可定时显示报警系统实现了设备信息的查询、增加、删除、修改和报表打印等功能，使定时报警的形式具体化，获得了理想的定时效果。
The system realizes many functions such as query, adding, deleting, modification, report printing and so on. And these functions make alarm more concrete in form, and more effective in realization.
本文论述的可定时显示报警系统实现了设备信息的查询、增加、删除、修改和报表打印等功能，使定时报警的形式具体化，获得了理想的定时效果。
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