Multiple choice technology Which of the following function can not be used in an expression transformation? Variance Substr instr Add_to_date Reveal answer Fill a bubble to check yourself A Correct answer Explanation Variance is an aggregate statistical function that can only be used in Aggregator transformations in Informatica. Expression transformations support only single-row functions that operate on one row at a time, such as Substr, instr, and Add_to_date.