MSSQL2008分區表

概念就很少說了,網上大把.  

--分區函數的做用是告訴SQL Server,如何將數據進行分區,例如按時間,按年齡,按省.

--而分區方案的做用則是告訴SQL Server,將已分區的數據放在哪一個文件組中. 多個硬盤上分開選擇的文件組更好. 

一,用語句

建立,分區方案:

CREATE PARTITION SCHEME YearCustomerFollow AS PARTITION
YearCustomerFollowFunction TO([PRIMARY],[PRIMARY],[PRIMARY],[PRIMARY],[PRIMARY])

建立,分區函數:

CREATE PARTITION FUNCTION YearCustomerFollowFunction(datetime)
 AS RANGE RIGHT FOR VALUES('20100101','20110101','20120101','20130101')

刪除一個分區:

ALTER PARTITION FUNCTION YearCustomerFollowFunction() MERGE RANGE ('20100101')

添加一個分區:

ALTER PARTITION SCHEME YearCustomerFollow NEXT USED [PRIMARY]     -- 分區方案
ALTER PARTITION FUNCTION YearCustomerFollowFunction() SPLIT RANGE ('20090101')  -- 分界值

建立分區:(這裏的語句能夠用嚮導生成更方便)

USE [SQL_ZZW]
GO
BEGIN TRANSACTION
CREATE CLUSTERED INDEX [ClusteredIndex_on_YearCustomerFollow_01] ON [dbo].[ZZW_test]
(
    [birthyday]
)WITH (SORT_IN_TEMPDB = OFF, IGNORE_DUP_KEY = OFF, DROP_EXISTING = OFF, ONLINE = OFF) ON [YearCustomerFollow]([birthyday])


DROP INDEX [ClusteredIndex_on_YearCustomerFollow_01] ON [dbo].[ZZW_test] WITH ( ONLINE = OFF )

 查詢分區錶行數.

select $PARTITION.YearCustomerFollowFunction(birthyday) as 分區編號,count(id) as 記錄數
from zzw_test
group by $PARTITION.YearCustomerFollowFunction(birthyday)

二,用嚮導

1,在要修改的表上右鍵->存儲->建立分區.

2,選擇分區列.

3,建立分區函數或選擇之後的分區函數.

4,建立分區方案或選擇現有分區方案.

5,映射分區,先設置邊界.

6,能夠看到邊界值都一會兒已經設置好了.

7,建立完成.

查看:表右鍵->存儲-管理壓縮.能夠看到各分區的行數,空間.

在控制檯庫->存儲下能夠直接看到剛建立的分區方案和分區函數.