sql server 2005中的表分区

SQL SERVER 2005中，终于引入了表分区，就是说，当一个表里的数据很多时，可以将其分拆到多个的表里，大大提高了性能。下面举例子说明之

比如，在C盘下建立如下几个目录C:Data2PrimaryC:Data2FG1C:Data2FG2C:Data2FG3C:Data2FG4

其中primary存放的是主数据库文件，其他FG1--FG4存放四个单独的文件组，可以见创立数据库Data Partition DB2，如下

USE [master]GO/****** Object:; Database [Data Partition DB];Script Date: 10/08/2006 23:09:53 ******/IF; EXISTS (SELECT name FROM sys.databases WHERE name = N'Data Partition DB2')DROP DATABASE [Data Partition DB2]GOCREATE DATABASE [Data Partition DB2]ON PRIMARY(NAME='Data Partition DB Primary FG',FILENAME='C:Data2PrimaryData Partition DB Primary FG.mdf',SIZE=5,MAXSIZE=500,FILEGROWTH=1 ),FILEGROUP [Data Partition DB FG1](NAME = 'Data Partition DB FG1',FILENAME ='C:Data2FG1Data Partition DB FG1.ndf',SIZE = 5MB,MAXSIZE=500,FILEGROWTH=1 ),FILEGROUP [Data Partition DB FG2](NAME = 'Data Partition DB FG2',FILENAME ='C:Data2FG2Data Partition DB FG2.ndf',SIZE = 5MB,MAXSIZE=500,FILEGROWTH=1 ),FILEGROUP [Data Partition DB FG3](NAME = 'Data Partition DB FG3',FILENAME ='C:Data2FG3Data Partition DB FG3.ndf',SIZE = 5MB,MAXSIZE=500,FILEGROWTH=1 ),FILEGROUP [Data Partition DB FG4](NAME = 'Data Partition DB FG4',FILENAME ='C:Data2FG4Data Partition DB FG4.ndf',SIZE = 5MB,MAXSIZE=500,FILEGROWTH=1 )接下来，我们创建分区表函数，这其实可以理解为一个规则，说明如何以一个规则来将一个表来划分，如下 use [Data Partition DB2]GOCREATE PARTITION FUNCTION [Data Partition Range](int)AS RANGE LEFT FOR VALUES (100,200,300)其中分区函数的名称是Data Partition Range,后面的类型（int)表明接下来用来分区的那个字段的类型是INT类型，而VALUES (100,200,300)表明，将把表分为4个区了，是从负数到100，100-200，200-300，大于300。接下来，我们要创建分区架构，即将分区函数应用到我们分好的四个文件组里面去USE [Data Partition DB2]goCREATE PARTITION SCHEME [Data Partition Scheme]AS PARTITION [Data Partition Range]TO ([Data Partition DB FG1], [Data Partition DB FG2], [Data Partition DB FG3],[Data Partition DB FG4]);再创建表的结构USE [Data Partition DB2]goCREATE TABLE MyTable(ID INT NOT NULL, Date DATETIME, Cost money); ON [Data Partition Scheme] (ID);

这里注意，ON [Data Partition Scheme] (ID);表明，划分时以ID的大小作为划分的根据，ON后要跟分区架购的名称

最后，我们可以填充数据了

USE [Data Partition DB2]godeclare @count intset @count =-25while @count <=100begininsert into MyTable select @count,getdate(),100.00set @count=@count+1endset @count =101while @count <=200begininsert into MyTable select @count,getdate(),200.00set @count=@count+1endset @count =201while @count <=300begininsert into MyTable select @count,getdate(),300.00set @count=@count+1endset @count =301while @count <=400begininsert into MyTable select @count,getdate(),400.00set @count=@count+1endset @count =401while @count <=800begininsert into MyTable select @count,getdate(),500.00set @count=@count+1end

最后，我们可以查询下，插入的这些数据，是否真的被划分到四个不同的文件组里的表分区了，可以这样看SELECT *, $PARTITION.[Data Partition Range](ID)FROM MyTable

http://www.cnblogs.com/jackyrong/archive/2006/11/13/559354.html