Returns information about currently active lock manager resources in SQL Server. Each row represents a currently active request to the lock manager for a lock that has been granted or is waiting to be granted.
Example:
Find locked tables SQL Server
select
object_name(P.object_id) as TableName,
resource_type,
resource_description
from
sys.dm_tran_locks L
join sys.partitions P on L.resource_associated_entity_id = p.hobt_id
