slow and long running queries

Query to show which queries are the worst performers.

SELECT TOP 50 creation_time 
        , 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 last_execution_time > '18 Feb 2016'
ORDER BY total_elapsed_time / execution_count DESC;

You may want to change the Order by...

You may lacks permissions to run this. Grrr.

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