本文总结了Oracle数学相关函数。分享给大家供大家参考，具体如下：@H_301_1@
1.绝对值：abs()@H_301_1@
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select abs(-2) value from dual;
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select ceil(-2.001) value from dual;(-2)
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select floor(-2.001) value from dual;(-3)
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select trunc(-2.001) value from dual; (-2)
5.四舍五入：round（）@H_301_1@
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select round(1.234564) value from dual;(1.2346)
6.取平方：Power（m,n）@H_301_1@
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select power(4,2) value from dual;(16)
7.取平方根:SQRT()@H_301_1@
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select sqrt(16) value from dual;(4)
8.取随机数:dbms_random(minvalue,maxvalue)@H_301_1@
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select sys.dbms.random.value(0,1) value from dual;
9.取符号：Sign()@H_301_1@
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select sign(-3) value from dual;(-)
10,取集合的最大值:greatest(value)@H_301_1@
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select greatest(-1,3,5,7,9) value from dual;(9)
11.取集合的最小值:least(value)@H_301_1@
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select least(-1,9) value from dual;(-1)
12.处理Null值：nvl(空值，代替值)@H_301_1@
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select nvl(null,10) value from dual;(10)
13.求字符序号:ascii()@H_301_1@
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select ascii(a) value from dual;
14.求序号字符:chr()@H_301_1@
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select chr(97) value from dual;
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select concat("11","22") value from dual;(1122)
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select sysdate value from dual;
17.求日期@H_301_1@
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select trunc(sysdate) from dual;
18.求时间@H_301_1@
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select to_char(sysdate,"hh24:mm:ss") from dual;
19.首字母大写：InitCAP()@H_301_1@
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select INITCAP(abc def ghi) value from dual;(Abc Def Ghi)
希望本文所述对大家Oracle数据库程序设计有所帮助。@H_301_1@ 原文链接：https://www.f2er.com/oracle/65098.html
