MySQL LOG2() function
MySQL LOG2() returns the natural logarithm of a number to the base 2.
Note :The equivalent expression for this function is LOG(N) / LOG(2).
This function is useful in -
- The LOG2() function calculates binary or base-2 logarithms, which are important in computer science and information theory.
- In computer science and algorithm analysis, binary logarithms frequently appear in the analysis of algorithms' time and space complexities, especially in divide-and-conquer algorithms.
- The LOG2() function is used to determine the height or depth of binary trees and other data structures, making it essential in data structure design and analysis.
- Binary logarithms are critical in information theory, where they are used to calculate the number of bits required to represent a set of possible outcomes, known as entropy.
- In digital signal processing (DSP), binary logarithms are used to analyze signal frequencies and perform Fourier analysis.
- The LOG2() function can be used to calculate the number of bits required to represent a range of values in computer memory, which is crucial in memory management and optimization.
MySQL Version: 8.0
Pictorial presentation of MySQL LOG2() function
Example of MySQL LOG2() function
The above MySQL statement returns the natural logarithm of 256 as specified in the argument to the base 2.
mysql> SELECT LOG2(256); +-----------+ | LOG2(256) | +-----------+ | 8 | +-----------+ 1 row in set (0.00 sec)
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