Removing a default value from a Sql Server 2005 table

I have a tabel in an Sql Server 2005 database. I have the following column

IndPL INT DEFAULT 0 NULL

I want to change the column to be of the type NVARCHAR but I receive a constraint violation due to the fact that the column has a default value constraint attached to it.

I need to find out how to remove a default value constraint from a table column or how to change the column type without impeding the constraint.

Added :

I need t开发者_如何学编程o do it by using T-SQL in a script that will later be executed on an another machine.

You need to remove the constraint first. In Management Studio open the table, open the Contraints and click on the contraint in question. Delete it. Change the data-type and then add any necessary constraints.

Script:

ALTER TABLE YourTable 

DROP CONSTRAINT Your_Contraint

ALTER TABLE YourTable 

ALTER COLUMN IndPL NVARCHAR(150)