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      为什么 SQL Server 会将两个整数相除的结果四舍五入?

      Why does SQL Server round off results of dividing two integers?(为什么 SQL Server 会将两个整数相除的结果四舍五入?)
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              1. 本文介绍了为什么 SQL Server 会将两个整数相除的结果四舍五入?的处理方法,对大家解决问题具有一定的参考价值,需要的朋友们下面随着跟版网的小编来一起学习吧!

                问题描述

                我有一个表,其中有一个 smallint 列,其中包含整数形式的百分比(即 50、75、85 等)

                I have a table with a smallint column that contains percentages as whole numbers (i.e., 50, 75, 85, etc.)

                当我将此列除以 100 时,如

                When I divide this column by 100, as in

                SELECT MY_COLUMN/100 AS PCT_AS_FRACTION
                FROM MY_TABLE
                

                结果四舍五入到最接近的整数.例如,对于包含数字50"的行,我的结果为零.

                the result is rounded to the nearest whole number. For example, for a row that contains the number "50", I get zero as my result.

                我可以用一个简单的语句来复制这个:

                I can duplicate this with a simple statement:

                SELECT 50 / 100 AS TEST_VALUE
                

                这是为什么,我怎样才能获得更精确的结果?

                Why is that, and how can I get more precision in my result?

                推荐答案

                当你做整数除法(整数除以整数)时,你总是得到一个整数答案.50/100 = .50,用整数来说是 0.

                When you do integer division (integer divided by integer) you always get an integer answer. 50/100 = .50, which is 0 in integer-speak.

                你试过用 MY_COLUMN 除以 100.0 吗?

                Have you tried dividing MY_COLUMN by 100.0?

                这篇关于为什么 SQL Server 会将两个整数相除的结果四舍五入?的文章就介绍到这了,希望我们推荐的答案对大家有所帮助,也希望大家多多支持跟版网!

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