mysql中格式化数字详解

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：

一、format函数：

格式化浮点数 format(number, length);

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.

示例代码

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'

RPAD:

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.

示例代码

mysql> SELECT RPAD('hi',5,'?');   -> 'hi???' mysql> SELECT RPAD('hi',1,'?');   -> 'h'mysql>SELET RPAD(12, 5 ,0);  ->12000

LPAD:

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.

示例代码

mysql> SELECT LPAD('hi',4,'??'); -> '??hi' mysql> SELECT LPAD('hi',1,'??'); -> 'h' mysql>SELECT LPAD(12, 5 , 0)  ->'00012'

总结

更多相关文章

随机推荐