随笔：mysql中trim()的用法

去除两边空格

SELECT TRIM(' 123 ') from xxx 结果123

去除左边空格

SELECT LTRIM(' 123') from xxx 结果123

去除右边空格

SELECT RTRIM('123 ') from xxx 结果123

去除两边指定字符

SELECT TRIM(BOTH '000' FROM '000123000'); 结果123

去除左边指定字符

SELECT TRIM(LEADING '000' FROM '000123000'); 结果123000

去除右边指定字符

SELECT TRIM(TRAILING '000' FROM '000123000'); 结果000123