Drop Primary Key Constraint in sql server 2008

In this post we will check how we can drop a Primary Key Constraint in sql server 2008.

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We can drop Primary Key Constraint by writing a query as well as we can drop by using Object Explorer.

By using Query:
Below is the query to remove or drop a primary key:

ALTER TABLE Employees
DROP CONSTRAINT PK_Employees_ID
GO

Here PK_Employees_ID is the Constraint name.

By Using Object Explorer:
Right click on the table -> Click on Design

or

Right click on the Primary Key column and then click on Modify.

The above step will open the table in Table Designer mode.

Now Right-click the row with the primary key and choose Remove Primary Key as shown in the fig below:

Here ID was the primary key column.