Which of the following Is NOT true of Aggregate functions?
A. You can place an aggregate function in a variable port
B. You can add a filter condition to calculate values for specific rows In the selected ports
C. You can use operators to perform arithmetic within the function
D. You can calculate a single value for all rows in a group
Correct answer is A
If you try to put into the expresion of any port inside of aggregator transformation (max(port1) for example) it’s appears the message: “Aggregate functions are not allowed in variables”.