tsql - Rollback trans and unlock tables on SQL Server -

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hy , had problems sql server because of unknown transactions left opened or lock table, , read many suggestion avoid restarting server
until found , , seems work
have others suggestion release locks , rollback trans ?
because reserved on running on production server

use master; go alter database [db_dev] set single_user rollback immediate; alter database [db_dev] set multi_user; go

you can check blocking process using 

sp_who2

then

kill spid

setting single_user reverting drop connections database. can dangerous on production servers.


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