Answer & Solution
Answer: Option A
Solution:
The
COUNT function in SQL is used to return the number of values within a specified column. It counts the total number of rows in a result-set or the number of non-NULL values in a specific column. Here's an explanation of each option:
Option A:
values.
This is the correct answer. The
COUNT function counts the total number of values (or rows) in a result-set or a specific column.
Option B:
distinct values.
The
COUNT function can also be used with the
DISTINCT keyword to count the number of distinct (unique) values in a column. However, this is not the primary function of the
COUNT function.
Option C:
groups.
The
COUNT function is not used to count groups. It is primarily used for counting values or rows.
Option D:
columns.
The
COUNT function does not count columns. It counts the number of values or rows.
So, the correct answer is
Option A: values..
