How to check dead lock process id and kill that blocking process in sql server database

Query to check blocking process in sql server.

SELECT
sp.spid
, sp.blocked AS BlockingProcess
, DB_NAME(sp.dbid) AS DatabaseName
, sp.loginame,sp.cpu
, CAST(text AS VARCHAR(1000)) AS SqlStatement
FROM sys.sysprocesses sp
CROSS APPLY sys.dm_exec_sql_text (sp.sql_handle)   order by BlockingProcess desc,sqlstatement

Kill blocking process

Kill 20 and execute