log(10, 12.0) AS log_12, log(3, 12.0) AS "log 12, base 3"; : log « Math Functions « PostgreSQL






  1. PostgreSQL
  2. Math Functions
  3. log

log(10, 12.0) AS log_12, log(3, 12.0) AS "log 12, base 3";


postgres=#
postgres=# SELECT log(10, 12.0) AS log_12,
postgres-#        log(3, 12.0) AS "log 12, base 3";
         log_12         |   log 12, base 3
------------------------+--------------------
 1.07918124604762482772 | 2.2618595071429149
(1 row)

postgres=#








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3.log(b, x): Returns the base b logarithm of x
4.log(x): Returns the base 10 logarithm of x