Oracle PL/SQL Tutorial/Numerical Math Functions/SIN — различия между версиями

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Текущая версия на 10:08, 26 мая 2010

ABS(-BS(0) ABS(456) SIGN(-IGN(0) SIGN(456)

SQL>
SQL> select  abs(-123),  abs(0),  abs(456)
  2  ,      sign(-123), sign(0), sign(456)
  3  from   dual;
 ABS(-123)     ABS(0)   ABS(456) SIGN(-123)    SIGN(0)  SIGN(456)
---------- ---------- ---------- ---------- ---------- ----------
       123          0        456         -1          0          1
SQL>


Ordinary Trigonometry Functions

SIN returns the sine of a value.

COS returns the cosine of a value.

TAN returns the tangent of a value.

The SIN, COS, and TAN functions take arguments in radians where,

radians = (angle*2* 3.1416 / 360)

14. 19. SIN 14. 19. 1. Ordinary Trigonometry Functions 14. 19. 2. <A href="/Tutorial/Oracle/0280__Numerical-Math-Functions/UsingtheSINfunctiontofindthesineof30degrees.htm">Using the SIN function to find the sine of 30 degrees</a> 14. 19. 3. <A href="/Tutorial/Oracle/0280__Numerical-Math-Functions/SIN0.htm">SIN(0)</a> 14. 19. 4. <A href="/Tutorial/Oracle/0280__Numerical-Math-Functions/selectsin30314159265180.htm">select sin(30*3.14159265/180)</a> 14. 19. 5. <A href="/Tutorial/Oracle/0280__Numerical-Math-Functions/ABS123ABS0ABS456SIGN123SIGN0SIGN456.htm">ABS(-123) ABS(0) ABS(456) SIGN(-123) SIGN(0) SIGN(456)</a>

select sin(30*3.14159265/180)

SQL>
SQL>
SQL> select sin(30*3.14159265/180)
  2  from   dual;
SIN(30*3.14159265/180)
----------------------
            .499999999
SQL>


SIN(0)

SQL> select SIN(0) from dual;
    SIN(0)
----------
         0


Using the SIN function to find the sine of 30 degrees

SQL>
SQL> -- create demo table
SQL> create table myTable(
  2    value1           NUMBER(3),
  3    value2           NUMBER(3),
  4    value3           NUMBER(3)
  5  )
  6  /
Table created.
SQL>
SQL> -- prepare data
SQL> insert into myTable(value1,value2, value3) values (30,60,90)
  2  /
1 row created.
SQL> select * from myTable
  2  /
    VALUE1     VALUE2     VALUE3
---------- ---------- ----------
        30         60         90
SQL>
SQL> SELECT SIN(value1*2*3.1416/360)FROM myTable
  2  /
SIN(VALUE1*2*3.1416/360)
------------------------
               .50000106
SQL>
SQL>
SQL> -- clean the table
SQL> drop table myTable
  2  /
Table dropped.