Top 10 Features of SQL 2008 R2
Introduction
Microsoft SQL Server 2008 R2 is the latest release of SQL Server. This article will introduce the top 10 features and benefits of SQL Server 2008 R2. The “R2” tag indicates this is an intermediate release of SQL Server and not a major revision. However, there are a number of interesting new features for both DBAs and developers alike. At the time of this article, R2 is available as a CTP (Community Technology Preview). In addition to new features, there are two new editions as well, SQL Server 2008 R2 Datacenter and SQL Server 2008 R2 Parallel Data Warehouse.
Report Builder 3.0
Report Builder is a tool set for developing rich reports that can be delivered over the web. Some of the features of Report Builder include the ability to create reports containing graphs, charts, tables, and printing controls. In addition, Report Builder also supports drill downs and sorting. If you are familiar with the third party tool Crystal Reports, then you have good idea of what to expect from Report Builder.
New features in SQL 2008 R2 / Report Builder 3.0 include: Map Layers, which can hold spatial and analytical data and will integrate with Microsoft Virtual Earth. Indicators, these are gauges used to show the state of one value. Report Parts, this object can be reused or shared between multiple reports. Aggregate Calculating, this allows you to calculate the total value of other aggregate calculated totals.
SQL Server 2008 R2 Datacenter
The new Datacenter edition of SQL Server 2008 R2 is targeted towards Enterprise Edition users who require a greater performance platform. The new edition will support 256 logical processors, high numbers of instances, and as much memory as the operating system will support.
SQL Server 2008 R2 Parallel Data Warehouse
Another new SQL Server edition, Parallel Data Warehouse, formally codenamed “Madison”, specializes in handling extremely large amounts of data. This new version uses massively parallel pro
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（1）整合简单,无关联的数据库访问：
如果你有几个简单的数据库查询语句,你可以把它们整合到一个查询中(即使它们之间没有关系)
（2）删除重复记录：
最高效的删除重复记录方法 ( 因为使用了ROWID)例子：
DELETE from EMP E WHERE E.ROWID > (SELECT MIN(X.ROWID)
from EMP X WHERE X.EMP_NO = E.EM ......
转自：http://book.csdn.net/bookfiles/235/10023510864.shtml
在实际SQL应用中，经常需要进行分组聚合，即将查询对象按一定条件分组，然后对每一个组进行聚合分析。
GROUP BY子句创建分组
创建分组是通过GROUP BY子句实现的。与WHERE子句不同，GROUP BY子句用于归纳信息类型，以汇总相关数据。而为什么要使用GROUP BY ......
新建表：
create table [表名]
(
[自动编号字段] int IDENTITY (1,1) PRIMARY KEY ,
[字段1] nVarChar(50) default '默认值' null ,
[字段2] ntext null ,
[字段3] datetime,
[字段4] money null ,
[字段5] int default 0,
[字段6] Decimal (12,4) default 0,
[字段7] image null ,
)
删除表：
Drop table [表 ......
一 单词解释(2分/个) 34分
Data 数据 Database 数据库 RDBMS 关系数据库管理系统 GRANT 授权
REVOKE 取消权限 DENY 拒绝权限 DECLARE 定义变量 PROCEDURE存储过程
事务 Transaction 触发器 TRIGGER 继续 continue 唯一 unqiue
主键 primary key 标识列 identity 外键 foreign key 检 ......
最近需要测试一个项目, 需要SQL SERVER 2008, 在微软下载评估版后进行安装
中间发现了种种安装失败的问题，对该过程进行了记录，希望给遇到此类问题的朋友们共同探讨，有所帮助：
1. WINDOWS 2003, WINDOWS 7 新装的时候可行，但是如果有删除后重新安装则无法再次安装
2. 根据网上无数先驱的失败提示， 进行了无数重试， ......
