返回一个数字的反正切值

sql>selectsin(1.57079)fromdual;

02

19.ceil

---------

.52359878

----------------------------------------------

102427

sin(20)sinh(20)

4

如果不指定,默认为空格符

sql>selectacos(-1)fromdual;

ln(1)ln(2)ln(2.7182818)

cosh(20)

22.exp

sign(123)sign(-100)sign(0)

exp(2)exp(1)

14.trim(‘s‘from‘string‘)

返回指定值的绝对值

weather

1-10

sql>selectsign(123),sign(-100),sign(0)fromdual;

照指定的度行舍

242582598

mod(10,3)mod(3,3)mod(2,3)

24.ln

3.1415927

acos(-1)

对给定的数字取整数

返回n1的n2次方

sql>selectmod(10,3),mod(3,3),mod(2,3)fromdual;

返回大于或等于给数字的最小整数

sql>selectatan(1)fromdual;

-------------------------------

返回一个给定数字的余弦

log(2,1)log(2,4)

2345

返回双曲正弦的值

cos(-3.1415927)

power(2,10)power(3,3)

返回一个数字反余弦值

23.floor

返回一个n1除以n2的余数

floor(2345.67)

---------

21.cosh

sql>selectround(55.5),round(-55.4),trunc(55.5),trunc(-55.5)fromdual;

sql>selectcosh(20)fromdual;

102

------------------

100100

-1

20.cos

---------------

ceil(3.1415927)

atan(1)

31.sigh

0.69314718.99999999

sql>selectfloor(2345.67)fromdual;

---------------------

30.sin

1

sql>selectln(1),ln(2),ln(2.7182818)fromdual;

------------

56-5555-55

------------------

sql>selectceil(3.1415927)fromdual;

29.sign

--------

sql>selectpower(2,10),power(3,3)fromdual;

sql>selectsin(20),sinh(20)fromdual;

----------------------------

27.power

trailing剪掉后面的字符

--

weather‘);

给反正弦的值

---------------

18.atan

返回一个数字的对数值

给反余弦的值

sql>selectexp(2),exp(1)fromdual;

------------------

---------------------------

7.38905612.7182818

sql>selectabs(100),abs(-100)fromdual;

本章尚未读完,请击下一页继续阅读---->>>

sql>selectasin(0.5)fromdual;

--------------

leading剪掉前面的字符

15.abs

.78539816

abs(100)abs(-100)

sql>selectcos(-3.1415927)fromdual;

取数字n的符号,大于0返回1,小于0返回-1,等于0返回0

返回一个数字e的n次方

26.mod(n1,n2)

sql>selectlog(2,1),log(2,4)fromdual;

28.round和trunc

round(55.5)round(-55.4)trunc(55.5)trunc(-55.5)

---------

17.asin

asin(0.5)

16.acos

25.log(n1,n2)

xm

---------

wether

sin(1.57079)

返回一个数字的正弦值

返回一个以n1为底n2的对数