Home Database Mysql Tutorial 数据清洗小记(14):rtrim不被注意的用法_MySQL

数据清洗小记(14):rtrim不被注意的用法_MySQL

May 27, 2016 pm 01:46 PM

【背景】
在业务对逻辑下,需要对某字段数据进行处理,要求把右侧开始数起,从首位开始,为连续0的数据中0给去掉。我们习惯了使用rtrim函数来处理右侧开始的空格位,却忽视了该函数其实可以达到去除特定数字或字符的目的。

【解决】
使用rtrim函数,去除右侧开始,从首位开始连续的某数字或字符。

【实验】
1、举例:使用rtrim函数去除右侧首位开始的连续空格

SELECT RTRIM('232388    ')||RTRIM('2312323    ') FROM DUAL;
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<img src="/static/imghw/default1.png" data-src="http://img.bitscn.com/upimg/allimg/c151229/14513N913I440-1C13.jpg" class="lazy" alt="这里写图片描述" title="\"/><br/>SELECT (&lsquo;232388 &lsquo;)"|(&lsquo;2312323 &lsquo;) FROM DUAL;<br/><img src="/static/imghw/default1.png" data-src="http://img.bitscn.com/upimg/allimg/c151229/14513N913921Z-21155.jpg" class="lazy" alt="这里写图片描述" title="\"/><br/>2、举例:使用rtrim函数去除右侧首位开始的连续某个&ldquo;字符&rdquo;或&ldquo;数字&rdquo;

SELECT (&#39;232388aaaaa&#39;)||(&#39;2312323bbbbb&#39;) FROM DUAL;
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<code class="hljs sql"><img src="/static/imghw/default1.png" data-src="http://img.bitscn.com/upimg/allimg/c151229/14513N91406250-31V8.jpg" class="lazy" alt="这里写图片描述" title="\"/>

SELECT RTRIM(&#39;232388aaaaa&#39;,&#39;a&#39;)||RTRIM(&#39;2312323bbbbb&#39;,&#39;b&#39;) FROM DUAL;
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<code class="hljs sql"><code class="hljs ruleslanguage"><img src="/static/imghw/default1.png" data-src="http://img.bitscn.com/upimg/allimg/c151229/14513N9141W50-43939.jpg" class="lazy" alt="这里写图片描述" title="\">

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