command to check primary key in oracle using query

I have oracle database. Most time I am using the IDE but suppose I have a table in my database I want to know the Primary Key column, can anyone tell the command to  check primary key in oracle using query ?

SELECT cols.table_name, cols.column_name, cols.position, cons.status, cons.owner FROM all_constraints cons, all_cons_columns cols WHERE cols.table_name = 'TABLE_NAME' AND cons.constraint_type = 'P' AND cons.constraint_name = cols.constraint_name AND cons.owner = cols.owner ORDER BY cols.table_name, cols.position;