Modifying the length of a column list

Hi,
I need to maintain a MOSS 2007 site. It has an existing list with some columns to update. I need to reduce the length of these columns. Can I accomplish this operation with no impact on list data_
Fe, could I have a data truncation respect to these list columns?
Many thanks

Hi,
I seem to have been clear. I need to reduce the lenght of some list columns, thus to reduce the number of characters. The list is already existing and has some thousands of items.
In order to run a proof, I've modified the length (number of characters) of only one list column and then I've set the original length: the data saved inside the columns hasn't been truncated. So, I've noticed that setting the length of a list
column inside MOSS 2007 doesn't modify the pre-existing value, because doesn't modify the length of the corresponding column in the content database. Changing the lenght of a column affects only the input data operation in the MOSS list.
Bye

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