7.38905612.7182818

返回一个给定数字的余弦

weather‘);

floor(2345.67)

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

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17.asin

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

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21.cosh

28.round和trunc

acos(-1)

返回一个数字的正弦值

返回n1的n2次方

15.abs

14.trim(‘s‘from‘string‘)

16.acos

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

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100100

sql>selectceil(3.1415927)fromdual;

返回双曲正弦的值

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

27.power

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

sql>selectasin(0.5)fromdual;

如果不指定,默认为空格符

---------

返回指定值的绝对值

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

24.ln

20.cos

sin(20)sinh(20)

xm

asin(0.5)

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

--

返回一个n1除以n2的余数

23.floor

56-5555-55

-1

sql>selectacos(-1)fromdual;

给反余弦的值

sql>selectatan(1)fromdual;

4

照指定的度行舍

返回一个数字的反正切值

返回大于或等于给数字的最小整数

0.69314718.99999999

102427

---------

2345

02

sql>selectfloor(2345.67)fromdual;

返回一个数字e的n次方

ceil(3.1415927)

29.sign

.78539816

---------

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

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

1-10

返回一个数字的对数值

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

weather

19.ceil

22.exp

leading剪掉前面的字符

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

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

exp(2)exp(1)

cos(-3.1415927)

--------

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

sql>selectcos(-3.1415927)fromdual;

sql>selectcosh(20)fromdual;

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

30.sin

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

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

31.sigh

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

102

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

cosh(20)

sin(1.57079)

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

返回一个以n1为底n2的对数

25.log(n1,n2)

3.1415927

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

返回一个数字反余弦值

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

---------

对给定的数字取整数

atan(1)

abs(100)abs(-100)

26.mod(n1,n2)

sql>selectsin(1.57079)fromdual;

242582598

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

18.atan

wether

.52359878

1

给反正弦的值

trailing剪掉后面的字符

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