28.round和trunc

100100

wether

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

102

242582598

exp(2)exp(1)

asin(0.5)

给反余弦的值

abs(100)abs(-100)

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

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

-1

返回指定值的绝对值

25.log(n1,n2)

19.ceil

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

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

sin(1.57079)

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

---------

--------

18.atan

102427

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

21.cosh

返回一个数字的反正切值

返回n1的n2次方

sql>selectatan(1)fromdual;

26.mod(n1,n2)

7.38905612.7182818

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

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

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

如果不指定,默认为空格符

sql>selectacos(-1)fromdual;

返回大于或等于给数字的最小整数

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

24.ln

27.power

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

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

返回双曲正弦的值

---------

1-10

1

---------

返回一个给定数字的余弦

给反正弦的值

ceil(3.1415927)

31.sigh

cosh(20)

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

返回一个数字的正弦值

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sql>selectasin(0.5)fromdual;

.78539816

22.exp

trailing剪掉后面的字符

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

--

对给定的数字取整数

14.trim(‘s‘from‘string‘)

17.asin

weather

---------

sql>selectceil(3.1415927)fromdual;

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

56-5555-55

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

返回一个数字反余弦值

sql>selectsin(1.57079)fromdual;

29.sign

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

返回一个n1除以n2的余数

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

xm

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

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

15.abs

sql>selectfloor(2345.67)fromdual;

返回一个以n1为底n2的对数

02

返回一个数字e的n次方

23.floor

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

sql>selectcosh(20)fromdual;

30.sin

返回一个数字的对数值

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

4

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

atan(1)

sql>selectcos(-3.1415927)fromdual;

2345

sin(20)sinh(20)

acos(-1)

leading剪掉前面的字符

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

.52359878

20.cos

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

3.1415927

floor(2345.67)

16.acos

0.69314718.99999999

weather‘);

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

照指定的度行舍

cos(-3.1415927)

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