Oracle绝对值函数
作者:互联网
1.绝对值:abs()
select abs(-2) value from dual;
2.取整函数(大):ceil()
select ceil(-2.001) value from dual;(-2)
3.取整函数(小):floor()
select floor(-2.001) value from dual;(-3)
4.取整函数(截取):trunc()
select trunc(-2.001) value from dual; (-2)
5.四舍五入:round()
select round(1.234564) value from dual;(1.2346)
6.取平方:Power(m,n)
select power(4,2) value from dual;(16)
7.取平方根:SQRT()
select sqrt(16) value from dual;(4)
8.取随机数:dbms_random(minvalue,maxvalue)
select sys.dbms.random.value(0,1) value from dual;
9.取符号:Sign()
select sign(-3) value from dual;(-)
10,取集合的最大值:greatest(value)
select greatest(-1,3,5,7,9) value from dual;(9)
11.取集合的最小值:least(value)
select least(-1,3,5,7,9) value from dual;(-1)
12.处理Null值:nvl(空值,代替值)
select nvl(null,10) value from dual;(10)
13.求字符序号:ascii()
select ascii(a) value from dual;
14.求序号字符:chr()
select chr(97) value from dual;
15.链接:concat()
select concat("11","22") value from dual;(1122)
16.获取系统时间:sysdate()
select sysdate value from dual;
17.求日期
select trunc(sysdate) from dual;
18.求时间
select to_char(sysdate,"hh24:mm:ss") from dual;
19.首字母大写:InitCAP()
select INITCAP(abc def ghi) value from dual;(Abc Def Ghi)
标签:sysdate,10,函数,value,绝对值,dual,Oracle,2.001,select 来源: https://www.cnblogs.com/roak/p/15682788.html