Locks

SQL for detecting locks in SQL

 SELECT  L.request_session_id AS SPID, 
       DB_NAME(L.resource_database_id) AS DatabaseName,
       O.Name AS LockedObjectName, 
       P.object_id AS LockedObjectId, 
       L.resource_type AS LockedResource, 
       L.request_mode AS LockType,
       ST.text AS SqlStatementText,        
       ES.login_name AS LoginName,
       ES.host_name AS HostName,
       TST.is_user_transaction as IsUserTransaction,
       AT.name as TransactionName,
       CN.auth_scheme as AuthenticationMethod
 FROM    sys.dm_tran_locks L
       JOIN sys.partitions P ON P.hobt_id = L.resource_associated_entity_id
       JOIN sys.objects O ON O.object_id = P.object_id
       JOIN sys.dm_exec_sessions ES ON ES.session_id = L.request_session_id
       JOIN sys.dm_tran_session_transactions TST ON ES.session_id = TST.session_id
       JOIN sys.dm_tran_active_transactions AT ON TST.transaction_id = AT.transaction_id
       JOIN sys.dm_exec_connections CN ON CN.session_id = ES.session_id
       CROSS APPLY sys.dm_exec_sql_text(CN.most_recent_sql_handle) AS ST
 WHERE   resource_database_id = db_id()
 ORDER BY L.request_session_id

Ref: http://weblogs.sqlteam.com/mladenp/archive/2008/04/29/SQL-Server-2005-Get-full-information-about-transaction-locks.aspx

---

UPDATE

  Communication
SET
  Comm_DateTime = ctor_bookingdatetime
FROM
  Communication
INNER JOIN
  ctOrders
ON 
   ctor_ctOrdersID=comm_ctorderid 
   
   and ctor_case_caseid is null and ctor_engineeruserid is not null and ctor_orderStage in ('confirmed','booked','jobdone') and DATEDIFF(day,ctor_bookingdatetime,Comm_DateTime)<>0