Hi sem,
In your suggestion above:
UPDATE tab_A
SET c1 = f1(c1,c2,c3), c2 = f2(c1,c2,c3), c3 = f3(c1,c2,c3)
where is the "WHERE" clause?
I guess, there should be one. Otherwise, how do we know that the update is done for a specific group of c1,c2,c3?
In other words:
UPDATE tab_A
SET...