sql - Removing duplicate rows in MySQL -


in database have ~67 000 rows have 12k duplicate rows different key.

i remove duplicates , save 1 row.

table name: seb_societe

similar columns: nom, phone, adress, zip

i tried this, did not work:

delete seb_societe t  t.rowid < (select rowid                 seb_societe t2                  t.rowid <> t2.rowid                   ,  t.nom = t2.nom                   ,  t.address = t2.address);

can advise why attempt didn't work, or how achieve desired outcome. 

delete seb_societe exists     (     select *             (         select 1         seb_societe t2         t2.row_id > row_id         , nom = t2.nom         , address = t2.address         ) x1     )

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