Equivalent of Oracle’s RowID in MySQL

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Published on 2010-04-28T09:57:34Z Indexed on 2010/04/28 11:33 UTC
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is there an equivalent of oracle's rowid in mysql?

delete from my_table where rowid not in (select max(rowid) from my_table group by field1,field2)

I want to make a mysql equivalent of this query!!!

What i'm trying to do is, : The my_table has no primary key.. i'm trying to delete the duplicate values and impose a primary key (composite of field1, field2)..!!

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