我可以在SQL Server 2005中更改分区表吗？

Question

我正在研究具有时间序列数据的表的水平分区。我发现2005年的分区比2000年要容易得多，但我似乎无法找到答案：

我可以添加/删除分区表的列吗？

是否需要特殊步骤，因为它是分区？

Answer 1

我无法找到一个明确的答案（我发现DOC @ E.J布伦南参考有点密集和不明确的。）。所以我加入this example，并测试了，是的，你可以添加/删除列：

USE adventureworks 
go 

create partition function YearPF(datetime) as range right for values ('20050101'); 

-- Now we need to add filegroups that will contains partitioned values 
alter database adventureworks add filegroup YearFG1; 
alter database adventureworks add filegroup YearFG2; 

-- Now we need to add file to filegroups 
alter database adventureworks add file (name = 'YearF1', filename = 'C:\Program Files\Microsoft SQL Server\MSSQL.1\MSSQL\Data\AdvWorksF1.ndf') to filegroup YearFG1; 
alter database adventureworks add file (name = 'YearF2', filename = 'C:\Program Files\Microsoft SQL Server\MSSQL.1\MSSQL\Data\AdvWorksF2.ndf') to filegroup YearFG2; 

-- Here we associate the partition function to 
-- the created filegroup via a Partitioning Scheme 
create partition scheme YearPS as partition YearPF to (YearFG1, YearFG2) 

-- Now just create a table that uses the particion scheme 
create table PartitionedOrders 
(
    Id int not null identity(1,1), 
    DueDate DateTime not null, 
) on YearPS(DueDate) 

-- And now we just have to use the table! 
insert into PartitionedOrders values('20020101') 
insert into PartitionedOrders values('20030101') 
insert into PartitionedOrders values('20040101') 
insert into PartitionedOrders values('20050101') 
insert into PartitionedOrders values('20060101') 

-- Now we want to see where our values has falled 
select *, $partition.YearPF(DueDate) from PartitionedOrders 

-- see if we can add a column 
ALTER TABLE PartitionedOrders ADD NewColumn INT NULL 

-- add some more records, populating the new column 
insert into PartitionedOrders values('20010101', 1) 
insert into PartitionedOrders values('20070101', 2) 

-- see that they were inserted properly 
select *, $partition.YearPF(DueDate) from PartitionedOrders 

ALTER TABLE PartitionedOrders DROP COLUMN NewColumn 

-- see that the column dropped 
select *, $partition.YearPF(DueDate) from PartitionedOrders 

/* clean up 
drop table PartitionedOrders 
drop partition scheme YearPS; 
drop partition function YearPF; 
alter database adventureworks remove file YearF1; 
alter database adventureworks remove file YearF2; 
alter database adventureworks remove filegroup YearFG1; 
alter database adventureworks remove filegroup YearFG2; 
*/ 

Answer 2

除了执行涉及分区表的SWITCH操作外，ALTER TABLE可用于更改分区表的列，约束和触发器的状态，就像它用于非分区表一样。但是，此语句不能用于更改表本身的分区方式。要重新分区分区表，请使用ALTER PARTITION SCHEME和ALTER PARTITION FUNCTION。此外，您不能更改分区表的列的数据类型。

在这里阅读更多： http://technet.microsoft.com/en-us/library/ms190273.aspx