SQL Server Partition Table switch application in data migration

-- Create Partition Function
Create Partition Function partrange1 (INT)
As range left for values (10, 20, 30 );
Go
-- Create partition scheme
Create Partition Scheme partscheme1
As partition partrange1
All to ([primary]);
Go
-- Create Table that uses this partitioning scheme
Create Table parttable (col1 int, col2 varchar (20 ))
On partscheme1 (col1 );
Go
-- Query partition information
Select *
From SYS. partitions
Where object_id = object_id ('parttable ')
Go
-- Insert some sample data
Insert into parttable (col1, col2) values (5, 'parttable ')
Insert into parttable (col1, col2) values (6, 'parttable ')
Insert into parttable (col1, col2) values (7, 'parttable ')
Go
-- Select the data
Select * From parttable
Go
-- Switch in
Create Table newparttable (col1 int check (col1> 30 and col1