SQL server 2005的表分區(qū)

下面來說下，在SQL SERVER 2005的表分區(qū)里，如何對已經(jīng)存在的有數(shù)據(jù)的表進(jìn)行分區(qū)，其實(shí)道理和之前在http://www.cnblogs.com/jackyrong/archive/2006/11/13/559354.html說到一樣，只不過交換下順序而已，下面依然用例子說明：
   依然在c盤的data2目錄下建立4個文件夾，用來做4個文件組，然后建立數(shù)據(jù)庫

use master
IF  EXISTS (SELECT name FROM sys.databases WHERE name = N'Data Partition DB3')
DROP DATABASE [Data Partition DB3]
GO
CREATE DATABASE [Data Partition DB3]
ON PRIMARY
(NAME='Data Partition DB Primary FG3',
FILENAME=
'C:\Data2\Primary\Data Partition DB Primary FG3.mdf',
SIZE=5,
MAXSIZE=500,
FILEGROWTH=1 ),
FILEGROUP [Data Partition DB3 FG1]
(NAME = 'Data Partition DB3 FG1',
FILENAME =
'C:\Data2\FG1\Data Partition DB3 FG1.ndf',
SIZE = 5MB,
MAXSIZE=500,
FILEGROWTH=1 ),
FILEGROUP [Data Partition DB3 FG2]
(NAME = 'Data Partition DB3 FG2',
FILENAME =
'C:\Data2\FG2\Data Partition DB3 FG2.ndf',
SIZE = 5MB,
MAXSIZE=500,
FILEGROWTH=1 ),
FILEGROUP [Data Partition DB3 FG3]
(NAME = 'Data Partition DB3 FG3',
FILENAME =
'C:\Data2\FG3\Data Partition DB3 FG3.ndf',
SIZE = 5MB,
MAXSIZE=500,
FILEGROWTH=1 ),
FILEGROUP [Data Partition DB3 FG4]
(NAME = 'Data Partition DB3 FG4',
FILENAME =
'C:\Data2\FG4\Data Partition DB3 FG4.ndf',
SIZE = 5MB,
MAXSIZE=500,
FILEGROWTH=1 )
然后建立一個數(shù)據(jù)表：
USE [Data Partition DB3]
go
CREATE TABLE MyTable
(ID INT NOT NULL,
Date DATETIME,
Cost money ) on [primary]
并建立一個索引
USE [Data Partition DB3]
go
CREATE UNIQUE CLUSTERED INDEX MyTable_IXC
ON MyTable(ID) on [PRIMARY]
接下來往表里增加數(shù)據(jù)
USE [Data Partition DB3]
go
declare @count int
set @count =-25
while @count =100
begin
insert into MyTable select @count,getdate(),100.00
set @count=@count+1
end
set @count =101
while @count =200
begin
insert into MyTable select @count,getdate(),200.00
set @count=@count+1
end
set @count =201
while @count =300
begin
insert into MyTable select @count,getdate(),300.00
set @count=@count+1
end
set @count =301
while @count =400
begin
insert into MyTable select @count,getdate(),400.00
set @count=@count+1
end
set @count =401
while @count =800
begin
insert into MyTable select @count,getdate(),500.00
set @count=@count+1
end
此時查詢一下，可以看到數(shù)據(jù)都在一個表里select * from sys.partitions where object_name(object_id)='MyTable'

 我們再建立表分區(qū)函數(shù)use [Data Partition DB3]
GO
CREATE PARTITION FUNCTION [Data Partition Range](int)
AS RANGE LEFT FOR VALUES (100,200,300)
這里表明分區(qū)的原則是四個分區(qū)，從負(fù)數(shù)到100，101-200，201-300，大于300
當(dāng)然，如果用right for values的話，就是從負(fù)數(shù)到99，100到199，200-299，和大于300

最后，把表分區(qū)函數(shù)應(yīng)用到文件組里
USE [Data Partition DB3]
go
CREATE PARTITION SCHEME [Data Partition Scheme]
AS PARTITION [Data Partition Range]
TO ([Data Partition DB3 FG1], [Data Partition DB3 FG2], [Data Partition DB3 FG3],[Data Partition DB3 FG4]);
把原來建立好的表，移動到這個表分區(qū)里
Drop index MyTable_IXC on MyTable with (Move To [Data Partition Scheme] (ID) )

最后看一看select * from sys.partitions where object_name(object_id)='MyTable'

可以看到，原來的表的數(shù)據(jù)被正確分拆到四個文件組里去了，實(shí)現(xiàn)了表分區(qū)

http://www.cnblogs.com/jackyrong/archive/2006/11/16/562514.html