mysql - SQL Optimization, Nested Query -

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what better way implement such view query doesn't take long. 

select * table id in ( select id table group id having count(id) > 1 )

our server need run every 10 mins. thought of indexing id wasn't sure if right way go. 

select t.* table t join ( select id table group id having count(id) > 1 ) on a.id=t.id

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