Oracle round函数是什么意思?怎么运用?

Question

Oracle round函数是什么意思?怎么运用?

Answer 1

如何使用 Oracle Round 函数 (四舍五入)描述 : 传回一个数值，该数值是按照指定的小数位元数进行四舍五入运算的结果。SELECT ROUND( number, [ decimal_places ] ) FROM DUAL参数:number : 欲处理之数值decimal_places : 四舍五入 , 小数取几位 ( 预设为 0 )Sample :select round(123.456, 0) from dual; 回传 123select round(123.456, 1) from dual; 回传 123.5select round(123.456, 2) from dual; 回传 123.46select round(123.456, 3) from dual; 回传 123.456select round(-123.456, 2) from dual; 回传 -123.46