方法1：
SELECT
[session_id],
[blocking_session_id] AS '正在阻塞其他会话的会话ID',
DB_NAME([database_id]) AS '数据库名称',
[request_id],
[cpu_time],
[start_time] AS '开始时间',
[status] AS '状态',
[command] AS '命令',
dest.[text] AS 'sql语句',
[reads] AS '物理读次数',
[writes] AS '写次数',
[logical_reads] AS '逻辑读次数',
[row_count] AS '返回结果行数',
[wait_type] AS '等待资源类型',
[wait_time] AS '等待时间',
[wait_resource] AS '等待的资源'
FROM sys.[dm_exec_requests] AS der
CROSS APPLY
sys.[dm_exec_sql_text](der.[sql_handle]) AS dest
WHERE 1=1
ORDER BY [session_id] DESC
方法2：
查询阻塞主机
with t1 as (
select tableName,request_session_id,count(*) cn from (
select left(OBJECT_NAME(resource_associated_entity_id),50) as tableName,a.request_session_id from sys.dm_tran_locks a WHERE resource_type = 'OBJECT' ) t
group by tableName,request_session_id
)
,t2 as
(
select session_id,status,host_name,login_name from sys.dm_exec_sessions
)
select * from t1 ,t2 where t1.request_session_id=t2.session_id order by 1