数据库中的数字函数

数字函数

ROUND:四舍五入的操作

Select round(903.5)from dual;

Select round(903.53567)from dual;

Select round(-903.53567)from dual;

Select round(-903.53567,-1)from dual;//对整数取十位整

Select round(-903.53567,2)from dual;//保留 2位小数

Select round(903.5),round(903.53567),round(-903.53567),round(-903.53567),

round(-903.53567,2)from dual;

TRUNC:截取指定位置的内容

Select trunc(903.5),trunc(903.53567),trunc(-903.53567),trunc(-903.53567),

trunc(-903.53567,2) from dual;

MOD:取模或取余

Select mod(10,3)from dual;