Creating composite primary key in SQL Server

Question

How to add composite primary keys in SQL Server 2008?

I have a table as follows.

testRequest (wardNo nchar(5)
            , BHTNo nchar(5)
                   


        

Answer 1

How about something like

CREATE TABLE testRequest (
        wardNo nchar(5),
        BHTNo nchar(5),
        testID nchar(5),
        reqDateTime datetime,
        PRIMARY KEY (wardNo, BHTNo, testID)
);

Have a look at this example

SQL Fiddle DEMO