i did use one delete statement and it took ages so i had a go at decomposing it into lots of delete statements.

Basically i want to delete any rows that have a the same value for a particular column (in essence this column has to be unique but cant be a key as it is a calculated value and doesnt start off unique)

I had this code but it takes forever 
delete b.*
from tbl a
inner join tbl b
on a.col1 = b.col1

[download]
so i thought i'll get each row and get its value for the particular column and delete all rows in the db with that value. It's not elegant but will get teh job done.

But i'm not a perl person and the code i wrote for this just looked awful, plus i've done it wrong too :)

In reply to Re^2: cleaning up dbi code by Anonymous Monk
in thread cleaning up dbi code by Anonymous Monk

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