Question

Which of the following statements would calculate the max bytes per millisecond grouped by the album ID in the track table?

a. SELECT album ID, MAX(bytes/milliseconds) FROM track GROUP BY album ID;
b. SELECT album ID, SUM(bytes/milliseconds) FROM track GROUP BY album ID;
c. SELECT album ID, MIN(bytes/milliseconds) FROM track GROUP BY album ID;
d. SELECT album ID, MAX(milliseconds/bytes) FROM track GROUP BY album ID;

Answer 1

The correct statement for calculating the max bytes per millisecond grouped by the album ID is option a.

Step-by-step explanation:

The correct statement for calculating the max bytes per millisecond grouped by the album ID in the track table is option a. SELECT album ID, MAX(bytes/milliseconds) FROM track GROUP BY album ID.

This query uses the MAX() function to find the maximum value of bytes/milliseconds for each album ID. The GROUP BY clause is used to group the results by album ID.

Option b calculates the sum of bytes/milliseconds for each album ID, option c calculates the minimum value, and option d calculates the maximum value of milliseconds/bytes, which is not what we need in this case.

The question is asking how to calculate the maximum data throughput rate, measured in bytes per millisecond, for each album based on tracks in a database. The correct SQL statement for calculating this would involve a GROUP BY clause on the album ID and the MAX function applied to the ratio of bytes to milliseconds. This ensures we find the maximum value of the ratio for each album.