数据完整性

It requires to establish a data consistency and integrality, and good security database in the former.

对于前者要求建立起数据一致性和完整性强、数据安全性好的库。

In a database system, data integrity means safeguarding the data against invalid alteration or destruction.

在一个数据库系统，数据的完整性，就是维护数据，防止无效的改变或销毁。

SQL Server database used by the query language called Transact-SQL, SQL Server is the core, Transact-SQL strengthen the original SQL keywords for data access, storage and handling, and other functions, Transact-SQL expanded Process control designation, so that you can facilitate the preparation of the powerful storage process, they kept in the server side, pre-compiled and that the implementation rate is very block, the trigger is a special storage process, SQL Server database to ensure the integrity of quote , You can create insert, delete and update the trigger to control the relevant data in the table shown in the insert, delete, and update, you can also use the rules, default and restrictions, to assist the new Numerical applied to the table!

SQL Server所使用的数据库查询语言称为Transact-SQL，它是SQL Server的核心，Transact-SQL强化了原有的SQL关键字以进行数据的存取，储存及处理等功能，Transact-SQL扩充了流程控制指定，可以使你方便的编写功能强大的存储过程，他们存放在服务器端，并预先编译过，执行速度非常块，触发是一种特殊的存储过程，用来确保SQL Server数据库引用的完整性，你可以建立插入，删除和更新触发以控制相关的表格中对数据列的插入，删除和更新，你还可以使用规则，缺省以及限制，来协助将新的数值套用到表格中去！

In this paper we build a university scientific research management information system based on Client/Server and three-layer structure of ASP technology, and introduced the design aims, tasks and principle of the system with systematic investigation and analyzsis of demand., With the principle of integrality, practicability, opening, precursive and generality, data stream and data structure are analyzed detailedly, and logistic model which fits university scientific research management was established based on advanced structure system analysis method. In addition, it puts forward a series of the whole scheme of scientific research management system which bases on internet adapts large database development.the design of this system adapts new internet/intranet techonlogy and it can make us gather and share the whole provincial university scientific research information.lt studies and establishes oology structure and using platform of our provincial university scientific research management system, In addition,it also designs and formulates the system at the experimental unit(the scientific research department of NEAU).The scientific research management information system of NEAU is one part of the network information management system.

本课题采用基于客户／服务器和三层结构的ASP技术，在系统调研、需求分析的基础上，给出了基于互联网的省高校科研管理系统的设计目标、任务和原则；本系统的开发遵循完整性、通用性、实用性、先进性和开放性的原则，采用较为先进的结构化系统分析方法对数据流程、数据结构进行详尽的分析，制定一个适合高校科研管理的逻辑模型；提出一套基于互连网络的、采用大型数据库开发的科研管理系统的整体方案；系统设计采用Internet／Intranet全新技术，可做到全省高校科研信息集成与共享；研究制定我省高校科研管理信息系统的拓扑结构及应用平台，利用试点单位，设计和制定我省高校科研管理信息系统的功能结构和信息资源结构。

ABSTRACT In the field of DDBS , distributed data updating is a very important researchful problem, because da...

在分布式数据库领域，分布式数据更新是极其重要的研究课题，因为数据更新操作必须满足数据库的完整性、一致性、可靠性和稳定性要求。

Establishes to rise to the former request the data consistency is strong with the complete, the database that data saf

对于前者要求建立起数据一致性和完整性强、数据安全性好的数据库。

Call to create the vesication data uniformity sum the integrity to is strong for the former, good bank of data safety.

对于前者要求建立起数据一致性和完整性强、数据安全性好的库。

Ormer should make the function of application integrated and the usage is easy, the latter required a database with powl consistency and integrality, and nice security.

对于前者要求建立起数据一致性和完整性强、数据安全性好的库。而对于后者则要求应用程序功能完备，易使用等特点。

This method checks the integrity of data objects via cross-checking with grouped Hashes, where each group Hashes can indicate the integrity of all data independently.

该方法采用独立分组的Hash 对数据对象进行交叉检验，每组Hash 可独立指示所有数据对象的完整性。

Experiments show that this filter chain can more efficiently and completely decodes EPG data in terms of slightly CPU time raising.

实验表明，提出的方法能够有效地对EPG数据进行解码，在牺牲一部分CPU时间的基础上，数据的完整性得到了明显提高。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。