Oracle数据库中保留小数点后两位的问题解读

select trim(to_char(85.7323232, '9999999990.00')) as 两位小数 from dual;

select result,
       to_char(result, '9999.99') as "位数不足",
       to_char(result, '9999999999.99') as "位数充足",
       to_char(result, '0000.00') as "0的位数不足",
       to_char(result, '0000000000.00') as "0的位数充足",
       to_char(result, '9999999990.00') as "9的位数充足",
       trim(to_char(result, '9999999990.00')) as "9的位数充足且去掉左侧"
from (
    select 0 result from dual union
    select 1 result from dual union
    select 123 result from dual union
    select 123.4 result from dual union
    select 12345.67 result from dual union
    select 12345678.2 result from dual
)

select trim(to_char(0.7323232 * 100, '99990.99'))||'%' as 百分比 from dual;

select trim(to_char(0.7323232 * 100, '99990.99'))||'%' as 百分比 from dual;

select result,
       to_char(result * 100, '99.99') || '%' as "9位数不足",
       to_char(result * 100, '00.99') || '%' as "0位数不足",
       to_char(result * 100, '99990.99') || '%' as "百分比",
       trim(to_char(result * 100, '99990.99')) || '%' as "去左侧空格的百分比",
       to_char(result * 100, 'fm99990.99') || '%' as "使用fm前缀的格式百分比",
       to_char(result * 100, 'fm99990.00') || '%' as "使用fm前缀的格式百分比2"
from (
    select 0 result from dual union
    select 1 result from dual union
    select 0.12345 result from dual union
    select 0.2 result from dual union
    select 0.23 result from dual union
    select 0.234 result from dual union
    select 0.2345 result from dual union
    select 0.23454 result from dual union
    select 0.23456 result from dual
)