SQL code for the partitoned example

--
--Chapter 12 SQL code for the partitoned example.
--
 
USE AdventureWorks2008;

-- Create the partition function
CREATE PARTITION FUNCTION [OrderDateRangePFN](datetime)
AS RANGE RIGHT
FOR VALUES (N'2001-01-01 00:00:00', N'2002-01-01 00:00:00',
N'2003-01-01 00:00:00', N'2004-01-01 00:00:00');


-- Create the partition scheme
CREATE PARTITION SCHEME [OrderDatePScheme]
AS PARTITION [OrderDateRangePFN]
TO ([Primary], [Primary], [Primary], [Primary], [Primary]);


-- Create two tables: SalesOrderHeader is the partitioned table and SalesOrderHeaderOLD is the non-partitioned table

CREATE TABLE [dbo].[SalesOrderHeader](
 [SalesOrderID] [int] NULL,
 [RevisionNumber] [tinyint] NOT NULL,
 [OrderDate] [datetime] NOT NULL,
 [DueDate] [datetime] NOT NULL,
 [ShipDate] [datetime] NULL,
 [Status] [tinyint] NOT NULL
) ON [OrderDatePScheme]([OrderDate]);

CREATE TABLE [dbo].[SalesOrderHeaderOLD](
 [SalesOrderID] [int] NULL,
 [RevisionNumber] [tinyint] NOT NULL,
 [OrderDate] [datetime] NOT NULL  ,
 [DueDate] [datetime] NOT NULL,
 [ShipDate] [datetime] NULL,
 [Status] [tinyint] NOT NULL);

-- Load daata into the partitioned table
INSERT INTO SalesOrderHeader
SELECT [SalesOrderID],[RevisionNumber], [OrderDate],[DueDate],[ShipDate],[Status] FROM SALES.[SalesOrderHeader];

CREATE CLUSTERED INDEX SalesOrderHeaderCLInd
ON SalesOrderHeader(OrderDate) ON OrderDatePScheme(OrderDate);

CREATE CLUSTERED INDEX SalesOrderHeaderOLDCLInd ON SalesOrderHeaderOLD(OrderDate);

ALTER  TABLE [DBO].[SalesOrderHeaderOLD]  WITH CHECK  ADD CONSTRAINT [CK_SalesOrderHeaderOLD_ORDERDATE] CHECK  ([ORDERDATE]>=('2003-01-01 00:00:00') AND [ORDERDATE]<('2004-01-01 00:00:00'));

-- Verify data in the partitioned table
SELECT $partition.OrderDateRangePFN(OrderDate) AS 'Partition Number' ,min(OrderDate) AS 'Min Order Date' , max(OrderDate) AS 'Max Order Date',count(*) AS 'Rows In Partition'
FROM SalesOrderHeader
GROUP BY $partition.OrderDateRangePFN(OrderDate);


-- Switch the data from partition 4 into the SalesOrderHeaderOLD table
ALTER TABLE SalesOrderHeader
SWITCH PARTITION 4 TO SalesOrderHeaderOLD;


-- Switch the data from SalesOrderHeaderOLD back to partition 4
ALTER TABLE SalesOrderHeaderOLD   
SWITCH TO SalesOrderHeader PARTITION 4;


--To merge a partition range
ALTER PARTITION FUNCTION OrderDateRangePFN()
MERGE RANGE ('2003-01-01 00:00:00');



-- To split a partition range
ALTER PARTITION SCHEME OrderDatePScheme NEXT USED [Primary];
ALTER PARTITION FUNCTION OrderDateRangePFN()
SPLIT RANGE ('2003-01-01 00:00:00');