title: Delete the BLOB column values
body: <p>I have a table with BLOB column. The segment related to it is huge and all i want is somehow get rid of it. Can you please suggest a best way possible (in terms of time and space) to eliminate all the data in segment without dropping the column. I was thinking of dropping the column and then adding it but it is not the case as the developer is concerned with the position on which the column appears. </p>