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在mysql清除字符串空格有两个常用的使用方法一种是利用trim函数另一种是直接replace字符替换函数进行清除,下面我来给大家详细介绍。
(1)mysql replace 函数 语法:replace(object,search,replace) 意思:把object中出现search的全部替换为replace 案例: Code:
update `news` set `content`=replace(`content`,' ',''); (2)mysql trim 函数 完整格式:TRIM([{BOTH | LEADING | TRAILING} [remstr] FROM] str) 简化格式:TRIM([remstr FROM] str) 以下举例说明: Code:
1 mysql> SELECT TRIM(' phpernote ');
2 -> 'phpernote'
1 mysql> SELECT TRIM(LEADING 'x' FROM 'xxxphpernotexxx');
2 -> 'phpernotexxx'
1 mysql> SELECT TRIM(BOTH 'x' FROM 'xxxphpernotexxx');
2 -> 'phpernote'
1 mysql> SELECT TRIM(TRAILING 'xyz' FROM 'phpernotexxyz');
Code:
LTRIM(str) Returns the string str with leading space characters removed. Code:
mysql> SELECT LTRIM(' barbar');
-> 'barbar'
This function is multi-byte safe.
mysql中的去除右空格函数:
RTRIM(str)
Returns the string str with trailing space characters removed.
以下是代码片段:
mysql> SELECT RTRIM('barbar ');
-> 'barbar'
This function is multi-byte safe.
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