概念就不多說了,網上大把.
--分區函數的作用是告訴SQL Server,如何將數據進行分區,例如按時間,按年齡,按省.
--而分區方案的作用則是告訴SQL Server,將已分區的數據放在哪個文件組中. 多個硬盤上分開選擇的文件組更好.
一,用語句
創建,分區方案:
- CREATE PARTITION SCHEME YearCustomerFollow AS PARTITION
- YearCustomerFollowFunction TO([PRIMARY],[PRIMARY],[PRIMARY],[PRIMARY],[PRIMARY])
創建,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
創建分區:(這裏的語句可以用嚮導生成更方便)
- 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->創建分區.
2,選擇分區列.
3,創建分區函數或選擇以後的分區函數.
4,創建分區方案或選擇現有分區方案.
5,映射分區,先設置邊界.
6,可以看到邊界值都一下子已經設置好了.
7,創建完成.
查看:表右鍵->存儲-管理壓縮.可以看到各分區的行數,空間.
在控制檯庫->存儲下可以直接看到剛創建的分區方案和分區函數.