Max of n columns in script

[arsenal1983]

Hello,

I have data as below. I want to add new column with the max data for each row. How can I do this:

DOC	D1	D2	D3	D4
FA_1	2014-12-15	2014-11-30	2014-12-07	2014-11-29
FA_2	2014-12-05		2014-12-13	2014-12-04
FA_3	2014-12-25	2014-12-24	2014-12-26

[MK_QSL · Accepted solution]

RangeMax(D1,D2,D3,D4) as MaxD