Killing User Connection(session) connected to the Database.

DECLARE @SPID varchar(8000)
DECLARE @Conntions_Killed smallint
DECLARE @DBName varchar(100)

SET @SPID = ''
SET @Conntions_Killed = 0;
SET @DBName = 'test' -- Pass the Database Name.

SELECT @SPID=coalesce(@spid,',' )+'KILL '+convert(varchar, spid)+ '; '
FROM MASTER..SYSPROCESSES WHERE dbid=db_id(@DBName);

Print @SPID;

IF LEN(@SPID) > 0
BEGIN
EXEC(@SPID);

SELECT @Conntions_Killed = COUNT(1)
FROM master..sysprocesses WHERE dbid=db_id(@DBName)

END