Createing a new Index in SQL when current records don't meet that index

Posted by Jonathan on Stack Overflow See other posts from Stack Overflow or by Jonathan
Published on 2010-03-12T13:32:24Z Indexed on 2010/03/12 13:37 UTC
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mysql

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indexing

Hey all-

I'd like to add an index to a table that already contains data. I know that there a few records currently in the table that are not unique with this new index. Clearly, MySQL won't let me add the index until all of them are.

I need a query to identify the rows which currently have the same index. I can then delete or modify these rows as necessary. The new index contains 6 fields.

Thanks-

Jonathan

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