How to determine the primary key for a table in SQL Server?

Question

What I\'d like to be able to do in SQL Server 2005 somehow is with a table name as input determine all the fields that make up the primary key. sp_columns doesn

Answer 1

I ended up using this...

select  cu.constraint_catalog, 
        cu.constraint_schema, 
        cu.table_name, 
        cu.constraint_name, 
        constraint_type, 
        column_name, 
        ordinal_position

from    information_schema.key_column_usage cu 

        join information_schema.table_constraints as tc
            on tc.constraint_catalog = cu.constraint_catalog and 
                tc.constraint_schema = cu.constraint_schema and 
                tc.constraint_name   = cu.constraint_name and 
                tc.table_name        = cu.table_name

where   cu.table_name = 'table_name_goes_here'

order by constraint_name, ordinal_position