Oracle PL/SQL/Numeric Math Functions/TANH — различия между версиями

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Версия 13:45, 26 мая 2010

TANH() function returns the hyperbolic tangent of <numeric expression>

 
SQL>
Syntax: TANH(<numeric expression>)
SQL>
SQL>
SQL> SELECT TANH(.5) AS RESULT FROM DUAL;
    RESULT
----------
.462117157
SQL>



TANH: Returns the hyperbolic tangent of a value

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"),-12.12);
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> -- TANH: Returns the hyperbolic tangent of a value.
SQL> SELECT TANH(MyNumber*2*3.1416/360) FROM TestTable;
TANH(MYNUMBER*2*3.1416/360)
---------------------------
                 .208434706
                 -.20843471
                 .367663472
                 -.03698419
                 .036635596
SQL>
SQL>
SQL>
SQL>
SQL>
SQL> drop table TestTable;
Table dropped.
SQL>



TANH(x): Returns the hyperbolic tangent of x

SQL>
SQL> --TANH(x): Returns the hyperbolic tangent of x.
SQL>
SQL> select TANH(1) from dual;
   TANH(1)
----------
.761594156
SQL>