摘要:
一、Sql函数 1、数值函数(输入参数和返回值都是数值型,多数函数精确到38位)--多少次方select power(3,2) from dual;--开方select sqrt(3) from dual;--绝对值select ABS(-12) from dual;--向上取值select ceil(5.3)from dual;--向下取值select floor (5.3)from dual;--四舍五入select round (1.235,2) from dual;--截取select trunc (152.3365) from dual;--判断正负select sign ... 阅读全文