照指定的度行舍

27.power

abs(100)abs(-100)

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

返回指定值的绝对值

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

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

2345

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

--------

返回一个n1除以n2的余数

给反余弦的值

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

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

cosh(20)

asin(0.5)

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

4

56-5555-55

如果不指定,默认为空格符

19.ceil

对给定的数字取整数

返回一个数字e的n次方

--

20.cos

22.exp

15.abs

---------

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

sin(1.57079)

1

返回n1的n2次方

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

sql>selectcosh(20)fromdual;

1-10

本章尚未读完,请击下一页继续阅读---->>>

102

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

sql>selectfloor(2345.67)fromdual;

sql>selectsin(1.57079)fromdual;

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

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

给反正弦的值

sql>selectacos(-1)fromdual;

---------

ceil(3.1415927)

返回一个数字的对数值

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

23.floor

sql>selectasin(0.5)fromdual;

floor(2345.67)

返回一个给定数字的余弦

.52359878

wether

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

atan(1)

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

cos(-3.1415927)

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

weather‘);

.78539816

102427

3.1415927

sql>selectatan(1)fromdual;

26.mod(n1,n2)

0.69314718.99999999

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

sql>selectceil(3.1415927)fromdual;

xm

30.sin

31.sigh

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

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

18.atan

返回双曲正弦的值

28.round和trunc

返回一个数字反余弦值

trailing剪掉后面的字符

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

返回一个数字的正弦值

返回一个以n1为底n2的对数

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

weather

14.trim(‘s‘from‘string‘)

242582598

100100

---------

24.ln

16.acos

7.38905612.7182818

29.sign

exp(2)exp(1)

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

acos(-1)

-1

sin(20)sinh(20)

02

17.asin

---------

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

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

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

25.log(n1,n2)

sql>selectcos(-3.1415927)fromdual;

返回一个数字的反正切值

leading剪掉前面的字符

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

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

返回大于或等于给数字的最小整数

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

21.cosh