Find Top 5 expensive Queries from a Read IO perspective

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The below written query helps us find the most expensive queries from a read IO perspective. The DMV that we have used in this script is sys.dm_exec_query_stats and the function that we have used is sys.dm_exec_sql_text.

SELECT TOP 5 qt.text AS 'SQL', qstats.total_physical_reads AS 'Total Physical Reads',
 qstats.total_physical_reads/qstats.execution_count AS 'Average Physical Reads',
    qstats.execution_count AS 'Execution Count',
    qstats.total_worker_time/qstats.execution_count AS 'Average Worker Time',
    qstats.total_worker_time AS 'Total Worker Time',
    DATEDIFF(Hour, qstats.creation_time, GetDate()) AS 'AgeInCache In Hours', db_name(qt.dbid) AS 'Database Name'
    FROM sys.dm_exec_query_stats AS qstats
    CROSS APPLY sys.dm_exec_sql_text(qstats.sql_handle) AS qt
    WHERE qt.dbid = db_id() -- Filter by current database
    ORDER BY qstats.total_physical_reads DESC

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