subquery in delete

Hi all,

I have a SQL question.
If I want to delete all the duplicated record in a table,
how can I do that in MySQL?
I am using MySQL 3.23.49 on AIX 4.3.3

there is a key field in the table

what I want to do is check all the duplicated record by
select order_no, count(*)
from order
group by order_no
having count(*) > 1;

then these duplicated rows can be all inserted into
another table.
but I don't know how to delete them from the original
table.

Thank you

Borus

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