finding multi column duplicates mysql -

How can I get a duplicate record for multi-column? Primary key in the table (auto increment)

Easy

  id a_id b_id ---- ---- ------ 1 34 23 2 34 23 3 35 25    For example, I have the same a_id and b_id ...  
 thanks   
 
   t.id, t.a_id, t.b_id (a_id, b_id a_id by bbl, b_id count (*)> 1) x, TBT T, where x.a_id = t.a_id and x.b_id = t.b_id order t.a_id, t.b_id    This query will show you all duplicates Tuplicate (a_id, b_id) On   

 


  







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