微软SQL Server 2008 CTP版的特性
自今年六月发布了 SQL Server 2008 的Community Technology Preview(CTP)1后，只隔了六个星期， 微软 又发布了CTP2，在最新的CTP版本中，有以下一些 特性 ： ? 报表服务方面的新 特性 ，包括一个新的报表设计器、配置工具和不再依赖于Microsoft IIS的企业报
自今年六月发布了SQL Server 2008的Community Technology Preview(CTP)1后，只隔了六个星期，微软又发布了CTP2，在最新的CTP版本中，有以下一些特性：
? 报表服务方面的新特性，包括一个新的报表设计器、配置工具和不再依赖于Microsoft IIS的企业报表引擎(enterprise reporting engine)。微软称，该报表引擎比早些时候发布的版本扩展性更高，现在还支持一个被称为Tablix(table和matrix的合并)的混合型报表项。
? 新的数据挖掘(分析服务)时间序列预测算法，能够实现更稳定的长期预测。
? 采用新的目录视图和一些动态管理函数能够有效地发现对象间的依存关系。这对DBA和第三方工具来说非常有用。
? 一个新的架构――Performance Data Collection，能够从SQL服务器和操作系统手机各种不同类型的有用数据，更加有利于日常维护和灾难排除。
? 为服务器系统准备了一个新的全面事件处理系统，称之为SQL Server Extended Event，该系统能够帮助把SQL服务器、操作系统甚至应用软件中发生的事件联结在一起。
? 数据库镜像升级到2.0版本，增强了多项性能，使整个平台更加可靠。
? 改进了ORDPATH以处理分层数据，能够有效地执行分层数据的查询、存储和管理操作。
? 支持大型用户自定义类型数据，用户可以扩大自定义类型数据容量，不再受8KB的限制。
? 新的日期和时间数据类型，允许日期和时间信息的分离，支持更广的范围、更高的精确度以及时区偏移值监测的datetime数据类型。这些新的数据类型对于管理数据仓库和联机事务处理(OLTP)来说非常有用。
? 改进了XML支持体系：可支持新的日期和时间数据类型，并加强了对周边的联合数据类型的支持。
不管是哪个版本的CTP，新特性都数不胜数。
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