LN: Returns natural logs, that is, logs with respect to base e : LN « Numeric Math Functions « Oracle PL / SQL

1. Oracle PL / SQL
2. Numeric Math Functions
3. LN

LN: Returns natural logs, that is, logs with respect to base e

SQL>
SQL> -- create demo table
SQL> create table TestTable(
  2    ID                 VARCHAR2(4 BYTE)         NOT NULL,
  3    MyName             VARCHAR2(10 BYTE),
  4    MyDate             DATE,
  5    MyNumber           Number(8,2)
  6  )
  7  /

Table created.

SQL>
SQL>
SQL> insert into TestTable (ID, MyName, MyDate, MyNumber) values('1','Alison',to_date('19960711','YYYYMMDD'),12.12);

1 row created.

SQL> insert into TestTable (ID, MyName, MyDate, MyNumber) values('1','Alison',to_date('19970622','YYYYMMDD'),2.12);

1 row created.

SQL> insert into TestTable (ID, MyName, MyDate, MyNumber) values('1','Alison',to_date('19980513','YYYYMMDD'),22.1);

1 row created.

SQL> insert into TestTable (ID, MyName, MyDate, MyNumber) values('1','Alison',to_date('19990624','YYYYMMDD'),2.12);

1 row created.

SQL> insert into TestTable (ID, MyName, MyDate, MyNumber) values('1','Alison',to_date('20000415','YYYYMMDD'),2.1);

1 row created.

SQL>
SQL>
SQL> select * from TestTable
  2
SQL>
SQL>
SQL> --LN: Returns natural logs, that is, logs with respect to base e.
SQL> SELECT LN(MyNumber) FROM TestTable;

LN(MYNUMBER)
------------
  2.49485698
  .751416089
  3.09557761
  .751416089
  .741937345

SQL>
SQL>
SQL>
SQL>
SQL> drop table TestTable;

           
       

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