Find Most Expensive Queries Using DMV

SELECTTOP 10 SUBSTRING(qt.TEXT, (qs.statement_start_offset/2)+1,
((CASE qs.statement_end_offset
WHEN -1 THEN DATALENGTH(qt.TEXT)
ELSE qs.statement_end_offset
END - qs.statement_start_offset)/2)+1),
qs
.execution_count,
qs
.total_logical_reads, qs.last_logical_reads,
qs
.total_logical_writes, qs.last_logical_writes,
qs
.total_worker_time,
qs
.last_worker_time,
qs
.total_elapsed_time/1000000 total_elapsed_time_in_S,
qs
.last_elapsed_time/1000000 last_elapsed_time_in_S,
qs
.last_execution_time,
qp
.query_plan
FROM sys.dm_exec_query_stats qs
CROSS APPLY sys.dm_exec_sql_text(qs.sql_handle) qt
CROSS APPLY sys.dm_exec_query_plan(qs.plan_handle) qp
ORDER BY qs.total_logical_reads DESC -- logical reads
-- ORDER BY qs.total_logical_writes DESC -- logical writes
-- ORDER BY qs.total_worker_time DESC -- CPU time