1) We can get queries execution plan from below query
SELECT
–st.text, qs.EXECUTION_COUNT
qs.*, cp.*
FROM sys.dm_exec_query_stats AS qs
CROSS APPLY sys.dm_exec_sql_text(sql_handle)AS st
CROSS APPLY sys.dm_exec_query_plan(plan_handle) AS cp
2) Column query_plan is having execution plan in XML form
3) When we click hyperlink in query_plan column, in SQL 2005,2008 & 2008 R2 it open as XML but in SQL 2012 it converted to graphical view
4) To convert XML to graphical view, save XML file with extension .sqlplan & open it with SSMS
5) Now plan will show in graphical view