《Mysql学习mysql中格式化数字详解》要点:
本文介绍了Mysql学习mysql中格式化数字详解,希望对您有用。如果有疑问,可以联系我们。
最近因为工作的需求,需要对mysql中数字进行格式化,但发现网上的资料较少,索性自己总结一下,方便自己也帮助有需要的朋友们,下面话不多说,来一起看看详细的介绍:MYSQL教程
一、format函数:
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格式化浮点数 format(number, length);
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介绍:Formats the number X to a format like '#,###,###.##', rounded to D decimal places, and returns the result as a string. If D is 0, the result has no decimal point or fractional part. D should be a constant value.
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示例代码MYSQL教程
mysql> SELECT FORMAT(12332.123456, 4); -> '12,332.1235' mysql> SELECT FORMAT(12332.1,4); -> '12,332.1000' mysql> SELECT FORMAT(12332.2,0); -> '12,332'
二、rpad 和 lpad 给定位数,不足补充自定义字符
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RPAD:
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Returns the string str,right-padded with the string padstr to a length of len characters. If
str is longer than len, the return value is shortened to len characters. MYSQL教程
示例代码 MYSQL教程
mysql> SELECT RPAD('hi',5,'?'); -> 'hi???' mysql> SELECT RPAD('hi',1,'?'); -> 'h' mysql>SELET RPAD(12, 5 ,0); ->12000
This function is multi-byte safe.MYSQL教程
LPAD:MYSQL教程
Returns the string str, left-padded with the string padstr to a length of lencharacters. If str is longer than len, the return value is shortened to lencharacters.
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示例代码MYSQL教程
mysql> SELECT LPAD('hi',4,'??'); -> '??hi' mysql> SELECT LPAD('hi',1,'??'); -> 'h' mysql>SELECT LPAD(12, 5 , 0) ->'00012'
参考:http://www.cnblogs.com/fenglie/articles/4409208.htmlMYSQL教程
总结MYSQL教程
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