Which of the following functions returns the Euclidean norm of a vector?

The Euclidean norm of a vector, often referred to as its length or magnitude, is calculated using a specific mathematical function. The function that specifically returns the Euclidean norm is VECTOR_NORM(). This function is designed to take a vector as input and compute its length based on the standard formula, which involves calculating the square root of the sum of the squares of its components.

This function is crucial in various applications, especially in machine learning and data analysis, where understanding the magnitude of vectors can influence algorithm behavior, such as in clustering and distance calculations. The ability to retrieve the Euclidean norm allows practitioners to assess similarities or differences between vector representations effectively.

The other functions do not pertain to calculating the Euclidean norm. For instance, VECTOR_SERIALIZE() is used to convert a vector into a format suitable for storage or communication. VECTOR_DIMENSION_COUNT() provides the number of dimensions a vector has, which contributes to understanding the structure of the vector but does not yield its magnitude. TO_VECTOR() performs the function of converting other data types into vector format but does not calculate any mathematical properties of the vector itself.