考试
2021-02-25 12:23:56

(单选题)What is true of using gro

题目描述

AGroup functions on columns ignore NULL values.

BGroup functions on columns returning dates include NULL values.

CGroup functions on columns returning numbers include NULL values.

DGroup functions on columns cannot be accurately used on columns that contain NULL values.

EGroup functions on columns include NULL values in calculations if you use the keyword INC_NULLS.

答案解析

[db:答案解析]

A

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