If emp_id contain the following set {-1, -2, 2, 3, -3, 1}, what will be the output on execution of the following MySQL statement?
SELECT emp_id
FROM person
ORDER BY emp_id;
SELECT emp_id
FROM person
ORDER BY emp_id;
A. {-3, -2, -1, 1, 2, 3}
B. {-1, 1, -2, 2, -3, 3}
C. {1, 2, 3, -1, -2, -3}
D. None of the mentioned
Answer: Option A
Solution (By Examveda Team)
This question is about sorting data in a MySQL database. Let's break it down:* emp_id: This represents a column in a table named "person" that stores employee IDs.
* SELECT emp_id: This part of the code tells MySQL to fetch the values from the "emp_id" column.
* FROM person: This specifies the table where the "emp_id" column is located.
* ORDER BY emp_id: This instruction tells MySQL to arrange the fetched "emp_id" values in ascending order (smallest to largest).
Now, let's look at the given set of "emp_id" values: {-1, -2, 2, 3, -3, 1}
When MySQL sorts these values in ascending order, it will place the negative numbers first, followed by the positive numbers. Within the negative numbers, it will sort from smallest to largest. The same applies to the positive numbers.
Therefore, the correct output will be: {-3, -2, -1, 1, 2, 3}
So the answer is Option A.
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