Which assertion about the following queries is true? SELECT COUNT(DISTINCT mgr), MAX(DISTINCT salary) FROM emp; SELECT COUNT(mgr), MAX(salary) FROM emp; Select one: O a. They will always return the same numbers in columns 1 and 2 O b. They will always return the same number in column 1 but may return different numbers in column 2 O c. They may return different numbers in column 1 but will always return the same number in column 2. O d. They may return different numbers in column 1 and may return different numbers in column 2

Database System Concepts
7th Edition
ISBN:9780078022159
Author:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Publisher:Abraham Silberschatz Professor, Henry F. Korth, S. Sudarshan
Chapter1: Introduction
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database multiple choice question pls

Which assertion about the following queries is true?
SELECT COUNT(DISTINCT mgr), MAX(DISTINCT salary)
FROM emp;
SELECT COUNT(mgr), MAX(salary)
FROM emp;
Select one:
O a. They will always return the same numbers in columns 1 and 2
O b. They will always return the same number in column 1 but may return different numbers in column 2
O . They may return different numbers in column 1 but will always return the same number in column 2.
O d. They may return different numbers in column 1 and may return different numbers in column 2
Transcribed Image Text:Which assertion about the following queries is true? SELECT COUNT(DISTINCT mgr), MAX(DISTINCT salary) FROM emp; SELECT COUNT(mgr), MAX(salary) FROM emp; Select one: O a. They will always return the same numbers in columns 1 and 2 O b. They will always return the same number in column 1 but may return different numbers in column 2 O . They may return different numbers in column 1 but will always return the same number in column 2. O d. They may return different numbers in column 1 and may return different numbers in column 2
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