--------

exp(2)exp(1)

返回双曲正弦的值

asin(0.5)

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

---------

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

25.log(n1,n2)

wether

02

19.ceil

242582598

20.cos

.78539816

abs(100)abs(-100)

18.atan

---------

给反正弦的值

返回一个数字e的n次方

sin(1.57079)

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

102427

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

26.mod(n1,n2)

返回一个n1除以n2的余数

27.power

sql>selectacos(-1)fromdual;

4

返回大于或等于给数字的最小整数

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

trailing剪掉后面的字符

1-10

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

23.floor

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

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

sql>selectasin(0.5)fromdual;

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

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

对给定的数字取整数

返回一个以n1为底n2的对数

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

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

-1

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

返回一个数字的对数值

sql>selectcos(-3.1415927)fromdual;

acos(-1)

floor(2345.67)

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

1

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

weather‘);

7.38905612.7182818

返回n1的n2次方

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

--

17.asin

cosh(20)

照指定的度行舍

15.abs

100100

0.69314718.99999999

sql>selectsin(1.57079)fromdual;

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

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

返回指定值的绝对值

2345

22.exp

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

weather

atan(1)

sin(20)sinh(20)

28.round和trunc

如果不指定,默认为空格符

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

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

返回一个数字的正弦值

24.ln

xm

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

56-5555-55

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

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

sql>selectatan(1)fromdual;

返回一个数字反余弦值

102

29.sign

leading剪掉前面的字符

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

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

返回一个数字的反正切值

sql>selectceil(3.1415927)fromdual;

本章尚未读完,请击下一页继续阅读---->>>

---------

30.sin

ceil(3.1415927)

14.trim(‘s‘from‘string‘)

返回一个给定数字的余弦

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

sql>selectcosh(20)fromdual;

21.cosh

.52359878

---------

16.acos

3.1415927

sql>selectfloor(2345.67)fromdual;

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

31.sigh

cos(-3.1415927)

给反余弦的值