Find Primary Keys, Foreign Keys or Constraints in a database, SQL Server 2008

I was asked to list the Primary keys in our databases then I listed using the below script. This is very useful when you have large number of tables.

SELECT  A.CONSTRAINT_CATALOG, A.CONSTRAINT_SCHEMA, B.CONSTRAINT_NAME, A.CONSTRAINT_TYPE,  B.COLUMN_NAME, B.ORDINAL_POSITION  from INFORMATION_SCHEMA.TABLE_CONSTRAINTS A Inner join        INFORMATION_SCHEMA.KEY_COLUMN_USAGE B   on A.CONSTRAINT_NAME=B.CONSTRAINT_NAME