ORACLE数字的处理
1.round
功能：四舍五入函数
如：select round(1.23456789,2) from dual;
?
2.trunc
功能：截取函数
如：select trunc(1.23456789,2) from dual;
3.金额转换函数
select? to_char(round(10000 / 100.00, 2), 'FM9999999999999999.00') as amount from dual
