Get the minimum value between several columns

Question

I\'m using SQL Server 2008;

Suppose I have a table \'X\' with columns \'Date1\', \'Date2\', \'Dateblah\', all of type DateTime.

I want to select the min valu

Answer 1

based on scalar function (from Tom Hunter):

SELECT ID, (SELECT MIN([date]) FROM (VALUES(Date1),(Date2),(Dateblah)) x([date])) MinDate
FROM TableName