Question

What is the result of the SQL query SELECT COUNT(DISTINCT id) FROM Movie?

1) The total count of distinct values in the 'id' column of the 'Movie' table
2) The total count of rows in the 'Movie' table
3) The average value of the 'id' column in the 'Movie' table
4) The sum of all values in the 'id' column of the 'Movie' table

Answer 1

The SQL query counts the unique 'id' values in the 'Movie' table, giving the total count of distinct movies.

Step-by-step explanation:

The SQL query counts the unique 'id' values in the 'Movie' table, giving the total count of distinct movies.The result of the SQL query SELECT COUNT(DISTINCT id) FROM Movie is option 1: The total count of distinct values in the 'id' column of the 'Movie' table.

This query will count the number of unique 'id' values, which helps to determine the number of different movies in the table if the 'id' column is used to uniquely identify each movie. It does not count the total number of rows, calculate an average, or sum up the values. Therefore, the query is useful when you need to know how many different records exist in a table based on a column that contains unique identifiers.