改变SQL Server分区功能？

Question

我已经创建了基于DateTime DataType的分区函数，下面是分区函数脚本及其对应的分区方案。

CREATE PARTITION FUNCTION [VZDArchiveDatePartition](datetime) AS RANGE LEFT FOR VALUES 
(N'2011-07-01T00:00:00.000', N'2011-08-01T00:00:00.000', N'2011-09-01T00:00:00.000', 
N'2011-10-01T00:00:00.000', N'2011-11-01T00:00:00.000', N'2011-12-01T00:00:00.000', 
N'2012-01-01T00:00:00.000', N'2012-02-01T00:00:00.000', N'2012-03-01T00:00:00.000', 
N'2012-04-01T00:00:00.000', N'2012-05-01T00:00:00.000', N'2012-06-01T00:00:00.000') 
GO 

CREATE PARTITION SCHEME [VZDArchivePartitionScheme] AS PARTITION [VZDArchiveDatePartition] TO 
([PRIMARY], [JulyFG], [AugFG], [SepFG], [OctFG], [NovFG], [DecFG], [Jan12FG], 
[Feb12FG], [Mar12FG], [Apr12FG], [May12FG], [Jun12FG]) 
GO 

在上述分区的功能中，我使用1个月作为范围value.Now我想改变分区范围从月到四分之一。 请建议如何改变分配给多个表的现有功能。

Answer 1

您可以合并分区（请参阅http://msdn.microsoft.com/en-us/library/ms186307.aspx以获得解释），但考虑到要合并的分区数和多个表，最好创建新分区方案并使用新方案删除并重新创建索引。

Answer 2

-- First merge two months into the third one 
ALTER PARTITION FUNCTION VZDArchiveDatePartition() MERGE RANGE (N'2011-08-01T00:00:00.000'); 
ALTER PARTITION FUNCTION VZDArchiveDatePartition() MERGE RANGE (N'2011-09-01T00:00:00.000'); 

-- Then shrink the files and delete them 
DBCC SHRINKFILE (N'AugFG' , 1) -- Ensure that 0 used, 0 estimated values are returned 
DBCC SHRINKFILE (N'SepFG' , 1) -- Ensure that 0 used, 0 estimated values are returned 

-- At the end, deleting the files and filegroups used might be an idea 
ALTER DATABASE [xxx] REMOVE FILE  [AugFG] 
ALTER DATABASE [xxx] REMOVE FILEGROUP [AugFG] 

ALTER DATABASE [xxx] REMOVE FILE  [SepFG] 
ALTER DATABASE [xxx] REMOVE FILEGROUP [SepFG]