Multiple Columns as Primary Key - SQL Server 2005

Steps to make multiple Columns of a table in SQL Server Management Studio

1. Go to Table Design.
2. Select a Column first to define it as Primary key.
3. To select multiple columns, hold down the CTRL key while you click the other columns.
4. Right-click the row selector for the column and select Set Primary Key.
5. A primary key index, named "PK_" followed by the table name is automatically created.

Hope this helps you

Happy Coding