MySql,Trim函数使用

 

TRIM([{BOTH
| LEADING | TRAILING} [remstr

]
FROM] 

str

), 

TRIM([remstr

 FROM] 

str

)

Returns the string 

str

 with
all 

remstr

 prefixes
or suffixes removed. If none of the specifiers 

BOTH

, 

LEADING

,
or 

TRAILING

 is given, 

BOTH

 is
assumed. 

remstr

 is
optional and, if not specified, spaces are removed.

mysql>

SELECT TRIM('  bar   ');

-> 'bar'
mysql>

SELECT TRIM(LEADING 'x' FROM 'xxxbarxxx');

-> 'barxxx'
mysql>

SELECT TRIM(BOTH 'x' FROM 'xxxbarxxx');

-> 'bar'
mysql>

SELECT TRIM(TRAILING 'xyz' FROM 'barxxyz');

-> 'barx'

This function is multibyte safe.