四舍五入数值 [英] Rounding of the numeric values

问题描述

我想舍入两列的值：

select a.region as "Regions",
       a.suminsured,2 as "SumInsured" ,
       a.suminsured/b.sum*100 as pct 
from (
    SELECT  region, sum(suminsured) as suminsured 
    FROM "Exposure_commune" group by region
) a,
(select sum(suminsured) FROM "Exposure_commune") b

我希望 suminsured 和 pct 列带有2个小数位。有人可以告诉我该怎么做吗？

I want the suminsured and pct columns to come with 2 decimal places. Can someone tell me what I should do?

推荐答案

您可以直接使用带有两个参数的数字。舍入十进制的第二个参数。

You can use directly numeric with two parameters. Second parameter for round decimal.

select sum(column_name::numeric(10,2)) from tablename

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