T-SQL: Using a CASE in an UPDATE statement to update certain columns depending on a condition

Question

I am wondering if this is possible at all. I want to update column x if a condition is true, otherwise column y would be updated

UPDATE table SET
     (CASE          


        

Answer 1

UPDATE  table
SET     columnx = CASE WHEN condition THEN 25 ELSE columnx END,
        columny = CASE WHEN condition THEN columny ELSE 25 END