MySQL - UPDATE query with SET statement dependent on the outcome of the previous SET statement

Question

Here is a tabular representation of what I would like to achieve with an UPDATE statement.

+----+----+---+---+----+----------+---------------+---------------+
|          


        

Answer 1

I actually found a solution to this problem using local variables in the SET statements. See below.

UPDATE [EXAMPLE]
SET [Calc A]    = @calc_a : = A - B
    , [Calc B]  = @calc_b := @calc_a / D
    , [Calc C]  = B / @calc_b