Copy the script in SQL Management Studio
Run it.
-- open transaction details
set nocount on
--SELECT
--er.session_id
----,er.open_transaction_count
--FROM sys.dm_exec_requests er
--where open_transaction_count > 0
--GO
declare @session_id nvarchar(50)
DECLARE session_id CURSOR FOR
SELECT
er.session_id
--,er.open_transaction_count
FROM sys.dm_exec_requests er
where open_transaction_count > 0
OPEN session_id
FETCH NEXT FROM session_id INTO @session_id
WHILE @@FETCH_STATUS = 0
BEGIN
declare @cmd nvarchar(4000);
Set @cmd = 'dbcc inputbuffer(' + @session_id + ')';
select @cmd
exec(@cmd)
FETCH NEXT FROM session_id INTO @session_id
END
CLOSE session_id
DEALLOCATE session_id
set nocount off 
The script will be helpful to kill all the user sessions before performing the refresh of the database.
2019-05-03 (first published: 2011-03-29)
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This article analyzes the performance gains of batching multiple DML statements into a single transaction. New author Manor Lev-Tov examines the effect of grouping statements together instead of running them all as separate transactions.
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