mysql - Two separate joins on the same query -

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i have query find duplicates in table:

select sofferenze.id_soff, sofferenze.descrizione sofferenze inner join ( select descrizione sofferenze group descrizione having count( id ) >1 )dup on sofferenze.descrizione = dup.descrizione order descrizione asc

it works charm , gives me duplicated rows. have query starting sofferenze.id_soff give me value in table:

select cod_fisc anagrafiche join `rischiatura` on anagrafiche.id_ndg = rischiatura.id_ndg id_ogg = 'sf000000012' , id_ruolo = 'ru010000002'

actually second query run each row returned first query replacing in line where id_ogg='sf000000012' value 'sf000000012' value sofferenze.id_soff returned first query.

this code not efficient because runs several times second query. there option can merge 2 queries?

why not combine sub-query?

select cod_fisc anagrafiche join `rischiatura` on anagrafiche.id_ndg = rischiatura.id_ndg id_ogg in (select x.id_soff     sofferenze x     x.descrizione in (         select ix.descrizione         sofferenze ix         group ix.descrizione         having count( * ) >1     )) , id_ruolo = 'ru010000002'

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