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How To Identify The Long Running Queries in SQL?

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These queries can help you  To Identify The Long Running Queries in SQL.

1.SELECT
creation_time
,last_execution_time
,total_physical_reads
,total_logical_reads
,total_logical_writes
, execution_count
, total_worker_time
, total_elapsed_time
, total_elapsed_time / execution_count avg_elapsed_time
,SUBSTRING(st.text, (qs.statement_start_offset/2) + 1,
((CASE statement_end_offset
WHEN -1 THEN DATALENGTH(st.text)
ELSE qs.statement_end_offset END
- qs.statement_start_offset)/2) + 1) AS statement_text
FROM sys.dm_exec_query_stats AS qs
CROSS APPLY sys.dm_exec_sql_text(qs.sql_handle) st
where total_elapsed_time >= 800000000
ORDER BY total_elapsed_time / execution_count DESC;

2.DBCC opentran(This command will display the longest running transactions on the database) and select * from sys.dm_tran_active_snapshot_database_transactions(this command will display the transactions about replication and mirroring and snapshot isolated related transactions)
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