List current SQL Server tempdb statements

SELECT ssu.session_id,
(ssu.internal_objects_alloc_page_count + sess_alloc) as allocated,
(ssu.internal_objects_dealloc_page_count + sess_dealloc) as deallocated
, stm.TEXT
from sys.dm_db_session_space_usage as ssu, 
sys.dm_exec_requests req
CROSS APPLY sys.dm_exec_sql_text(sql_handle) AS stm ,
(select session_id, 
sum(internal_objects_alloc_page_count) as sess_alloc,
sum (internal_objects_dealloc_page_count) as sess_dealloc
from sys.dm_db_task_space_usage group by session_id) as tsk
where ssu.session_id = tsk.session_id
and ssu.session_id >50
and ssu.session_id = req.session_id
and ssu.database_id = 2
order by allocated DESC