What is true of using group functions on columns that contain NULL values?
A.
Group functions on columns ignore NULL values.
B.
Group functions on columns returning dates include NULL values.
C.
Group functions on columns returning numbers include NULL values.
D.
Group functions on columns cannot be accurately used on columns that contain NULL
values.
E.
Group functions on columns include NULL values in calculations if you use the keyword
INC_NULLS.
Explanation:
group functions on column ignore NULL values
Incorrect answer:
Bgroup functions on column ignore NULL values
Cgroup functions on column ignore NULL valuesDNVL function can be use for column with NULL values
Eno such INC_NULLS keyword