Question

A column contains grades from 0 to 10, but a WHERE clause specifies values from 0 to 100. A _____ index can be used to modify the column values and process the queries.

Answer 1

A scaling or normalization index can be used to modify the column values and process the queries.

Step-by-step explanation:

A column contains grades from 0 to 10, but a WHERE clause specifies values from 0 to 100. In this case, a scaling or normalization index can be used to modify the column values and process the queries.

Scaling or normalization is a technique used to adjust the values of a variable to a specific range. In the given scenario, the column values need to be scaled from 0-10 to 0-100. This can be achieved by applying a linear transformation to each value in the column.

For example, if the original value is 'x', the scaled value 'x_scaled' can be calculated using the formula:

x_scaled = ((x - min_val) / (max_val - min_val)) * (new_max - new_min) + new_min