Log and Exponential Functions : Log « Numerical Math Functions « Oracle PL/SQL Tutorial

  1. LN returns natural logs, that is, logs with respect to base e.
  2. LOG returns base 10 log.
  3. EXP returns e raised to a value.
  4. POWER returns value raised to some exponential power.

14.14.1.Log and Exponential Functions
14.14.2.Using the LOG function
14.14.3.Get the log of 8, base 2
14.14.4.LOG(2, 4)
14.14.5.LOG(2, 5)