数字函数* ROUND:对指定的值进行四舍五入ROUND(45.926, 2) 45.93 TRUNC:对指定的值进行取整TRUNC(45.926, 2) 45.92 MOD:返回除法计算后的余数MOD(1600, 300)小数小数100 * select round(45.926,2),trunc(45.926,2),mod(1600,300) from dual; Number Functions Number functions accept numeric input and return numeric values. This section describes some of the number functions. Note: This list is a subset of the available number functions. For more information, see Oracle Server SQL Reference, Release 8, “Number Functions.”