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  • 处理 SQL SERVER 数据库的连接查询相关问题

    -- 查询数据库锁情况
    SELECT request_session_id [会话ID], DB_NAME(resource_database_id) [数据库名], OBJECT_NAME(resource_associated_entity_id) [表名]   
    FROM   sys.dm_tran_locks WHERE resource_type = 'OBJECT'
    
    -- 查询指定数据库的连接情况(去掉条件就是所有)
    SELECT * FROM master.dbo.sysprocesses
    WHERE dbid = DB_ID('psydb_zknu')
    
    -- 查询数据库某用户的连接情况
    sp_who 'sa'
    
    -- 关闭数据库连接(传入会话ID,连接关闭后,锁也就释放了)
    kill 123
    
    -- 查询哪个会话引起阻塞并且它们在运行什么
    SELECT  DTL.[request_session_id] AS [session_id] ,
            DB_NAME(DTL.[resource_database_id]) AS [Database] ,
            DTL.resource_type ,
            CASE WHEN DTL.resource_type IN ( 'DATABASE', 'FILE', 'METADATA' )
                 THEN DTL.resource_type
                 WHEN DTL.resource_type = 'OBJECT'
                 THEN OBJECT_NAME(DTL.resource_associated_entity_id,
                                  DTL.[resource_database_id])
                 WHEN DTL.resource_type IN ( 'KEY', 'PAGE', 'RID' )
                 THEN ( SELECT  OBJECT_NAME([object_id])
                        FROM    sys.partitions
                        WHERE   sys.partitions.hobt_id = DTL.resource_associated_entity_id
                      )
                 ELSE 'Unidentified'
            END AS [Parent Object] ,
            DTL.request_mode AS [Lock Type] ,
            DTL.request_status AS [Request Status] ,
            DER.[blocking_session_id] ,
            DES.[login_name] ,
            CASE DTL.request_lifetime
              WHEN 0 THEN DEST_R.TEXT
              ELSE DEST_C.TEXT
            END AS [Statement]
    FROM    sys.dm_tran_locks DTL
            LEFT JOIN sys.[dm_exec_requests] DER ON DTL.[request_session_id] = DER.[session_id]
            INNER JOIN sys.dm_exec_sessions DES ON DTL.request_session_id = DES.[session_id]
            INNER JOIN sys.dm_exec_connections DEC ON DTL.[request_session_id] = DEC.[most_recent_session_id]
            OUTER APPLY sys.dm_exec_sql_text(DEC.[most_recent_sql_handle]) AS DEST_C
            OUTER APPLY sys.dm_exec_sql_text(DER.sql_handle) AS DEST_R
    WHERE   DTL.[resource_database_id] = DB_ID()
            AND DTL.[resource_type] NOT IN ( 'DATABASE', 'METADATA' )
    ORDER BY DTL.[request_session_id];

    转自:https://www.cnblogs.com/xiashengwang/p/8581104.html

    https://www.cnblogs.com/linyijia/p/10253952.html


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  • 原文地址:https://www.cnblogs.com/xwgli/p/13671805.html
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