How to remove all values from column

Hi all
I have one table and in that i have one column which contain some null value.now i want add a not null constraint on that column but it already contain null values.
how shuld i delete that column value only or how should i proceed now please help me

What do you mean by REMOVE?
All values for that column are null or not? if not, then can those value removable?
NULL means no value, how can you remove non-existing value?
Update the null column to default value is one way.
the other is to drop the column and add it again together with your not -null constraint.
But I definitely wouldn`t recommend this approach in your case since some of your records have values for that column.

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Message was edited by:
Q_STEPHENSON

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