最近因為工作的需求,需要對mysql中數字進行格式化,但發現網上的資料較少,索性自己總結一下,方便自己也幫助有需要的朋友們,下面話不多說,來一起看看詳細的介紹:
一、format函數:
格式化浮點數 format(number, length);
介紹: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.
示例代碼
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 給定位數,不足補充自定義字符
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.
示例代碼
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.
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.
示例代碼
mysql> SELECT LPAD('hi',4,'??');
-> '??hi'
mysql> SELECT LPAD('hi',1,'??');
-> 'h'
mysql>SELECT LPAD(12, 5 , 0)
->'00012'
參考:http://www.cnblogs.com/fenglie/articles/4409208.html
總結
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