数据库存取

Conventional Authorizations that can be implemented as access control list, capability list and authorization Relations.

传统授权是通过存取控制表、能力表或授权表来组织授权数据库的。

Map of the object extraction, access to the database, you can quickly read!

这个是对地图对象的提取，存取在数据库中，可以快速的读取！

By using the technology of Data Access Object to access the Access database.

使用数据存取对象技术访问 Access 数据库实现的。

Access speed of disk is the key to database performance.

减少磁盘的存取时间是提高数据库性能的关键。

JDBC is a Java program to connect and access a database application program interface, this interface is part of the Java core API.

JDBC是Java程序连接和存取数据库的应用程序接口，此接口是Java核心API的一部分。

The task of controlling access to all the data can then be concentrated in a centralized database management system.

这样就能把控制存取所有数据的任务集中在一个中心的数据库管理系统中。

Data applications are set up resources for interoperable model of heterogeneous database environment or file system connected to achieve implementation of the middleware connectivity; at Distributed System, the essential data are concentrated in the data storage server, they can be a relationship between the type, compound document type, with a variety of multimedia-based storage format, or are encrypted or compressed storage, such middleware for virtual buffer at the network access, format conversion, extracting and other convenient

是为了建立数据应用资源互操作的模式，对异构环境下的数据库实现联接或文件系统实现联接的中间件；在分布式系统中，重要的数据都集中存放在数据服务器中，它们可以是关系型的、复合文档型、具有各种存放格式的多媒体型，或者是经过加密或压缩存放的，这类中间件将为在网络上虚拟缓冲存取、格式转换、解压等带来方便

Page server is adopted in KDOODB, which is a reasonable architecture, and KDOODB is an open system. Based on the ODMG-93 standard, the programming language C++ is expanded to act as programming language for database application, the impedance mismatch had been avoided, and the seamless integration of programming language and OODBMS had been realized. In KDOODB, big objects and complicate objects can be accessed quickly; the flexible deprocedure query language is provided, it can be used as both the embedded programming language and interactive command; WAL_P and the bit-based transaction identifier assignment strategy provide powerful support for the transaction management; several use patterns and friendly user interface are provided.

KDOODB系统采用了合理有效的页服务器结构，具有良好的开放性；基本符合ODMG-93国际标准，扩充当前国际上流行的面向对象编程语言C＋＋作为数据库应用编程语言，实现了数据库编程语言与OODBMS 的无缝集成，有效地避免了"阻抗失配"问题；能够快速存取大对象和复杂对象；提供方便灵活的非过程化的查询语言，既可以嵌入编程语言使用，又可以作为交互式命令使用；基于页的恢复策略和基于位的事务标识分配策略为有效的事务管理提供有力支持；为用户提供多种使用方式和友好的用户界面。

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！

Given the overload of database, parallel access of multi-database is implemented.

考虑到数据库的负载，实现了多数据库并行存取技术。

This one mode pays close attention to network credence foundation of the businessman very much.

这一模式非常关注商人的网络信用基础。

Cell morphology of bacterial ghost of Pasteurella multocida was observed by scanning electron microscopy and inactivation ratio was estimated by CFU analysi.

扫描电镜观察多杀性巴氏杆菌细菌幽灵和菌落形成单位评价遗传灭活率。