Aggregate functions perform calculations on a row of data and return a single value

Because the SUM function is a rarely used function it has no button on the Ribbon

Indicate whether the statement is true or false

A perfect hashing function

a) maps elements of the same size to the same position in the hash table b) maps elements to the next sequentially available space in the hash table c) maps elements of the same class to the same position in the hash table d) maps each element to a unique position in the hash table e) is not possible