SQL MAX of multiple columns?

Question

How do you return 1 value per row of the max of several columns:

TableName

[Number, Date1, Date2, Date3, Cost]

I n

Answer 1

I do not know if it is on SQL, etc... on M$ACCESS help there is a function called MAXA(Value1;Value2;...) that is supposed to do such.

Hope can help someone.

P.D.: Values can be columns or calculated ones, etc.