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SQL : remove table data

Last Modified: 2014-05-13

I have a large SQL table (called uploads) i wish to trim a lot of data out of to reduce the overall filesize which is balooning.

I am no SQL expert so any help would be greatly appreciated.

Uploaded files are saved directly into a database in a column as xml data.   The column is called 'XMLData'

I want to seach the table and remove uploaded file data from the 'xmldata' column that is older than 1 month. - this task will be run on a regular basis, am i best off using a query or a stored procedure?  I dont know whats best?

Basically this is what i want to do....

Where column 'messagetype'=AddAttachment' or 'App'

and 'datestamp' column is more than 1 month old..

remove the content data between the tags <contents> </contents>  in the  'XMLdata' column.

Thanks for any help and pointers in advance.
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