syber - 1:18 pm on Nov 14, 2007 (gmt 0)
I don't think you will find an easy solution to this. If you must have the information in BIGINT format, a compromise would be to create a virtual (computed) column with the datatype BIGINT. This virtual column would have a formula that converted the existing VARCHAR column contents to BIGINT using the CONVERT command. An added advantage is the virtual column doesn't take up any space.