数据清洗小记(14)：rtrim不被注意的用法

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数据清洗小记(14)：rtrim不被注意的用法_MySQL

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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(&#39;232388    &#39;)||RTRIM(&#39;2312323    &#39;) FROM DUAL;

<img src="/static/imghwm/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 (‘232388 ‘)"|(‘2312323 ‘) FROM DUAL;<br><img src="/static/imghwm/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“字符”或“数字”

SELECT (&#39;232388aaaaa&#39;)||(&#39;2312323bbbbb&#39;) FROM DUAL;

<code class="hljs sql"><img src="/static/imghwm/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;

<code class="hljs sql"><code class="hljs ruleslanguage"><img src="/static/imghwm/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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