LOG2() - Logarithm to Base 2

Q

How to calculate the logarithm of a number to base 2 using the LOG2() function?

✍: FYIcenter.com

A

LOG2(X) is a MySQL built-in function that calculates the logarithm of X to base 2. For example:

SELECT LOG2(1), LOG2(1024), LOG2(65536);
  -- +---------+------------+-------------+
  -- | LOG2(1) | LOG2(1024) | LOG2(65536) |
  -- +---------+------------+-------------+
  -- |       0 |         10 |          16 |
  -- +---------+------------+-------------+

Reference information of the LOG2() function:

LOG2(X): val
  Returns the base-2 logarithm of X.

Arguments, return value and availability:
  X: Required. The input value.
  val: Return value. The logarithm of the input value to base 2.
  Available since MySQL 4.0.

Related MySQL functions:

⇒ MAKE_SET() - Filtering List with Binary Set

⇐ LOG10() - Logarithm to Base 10

⇑ MySQL Functions on Numeric Values

⇑⇑ MySQL Function References

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