LTRIM(str)
Returns
the
string
str
with
leading
space
characters
removed.
以下是代码片段:
复制代码
代码如下:
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:
复制代码
代码如下:
mysql>
SELECT
RTRIM('barbar
')
->
'barbar'
This
function
is
multi-byte
safe.
trim函数可以过滤指定的字符串:
完整格式:TRIM([{BOTH
|
LEADING
|
TRAILING}
[remstr]
FROM]
str)
简化格式: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.
以下是代码片段:
复制代码
代码如下:
mysql>
SELECT
TRIM('
bar
')
//默认删除前后空格
->
'bar'
mysql>
SELECT
TRIM(LEADING
','
FROM
',,barxxx')
//删除指定首字符
如',‘
->
'barxxx'
mysql>
SELECT
TRIM(BOTH
','
FROM
',,bar,,,')
//删除指定首尾字符
->
'bar'
mysql>
SELECT
TRIM(TRAILING
','
FROM
'barxxyz,,')
->
'barxxyz'
复制代码
代码如下:
mysql>
UPDATE
table
SET
`field`=TRIM(TRAILING
','
FROM
`FIELD`)
WHERE
WHERE
`FIELD`
LIKE
'%,'
This
function
is
multi-byte
safe.
替换数据库中字段的最后一个分页符
复制代码
代码如下:
UPDATE
[!db.pre!]ecms_news_data_1
SET
`newstext`=TRIM(TRAILING
'[!--empirenews.page--]'
FROM
`newstext`)
WHERE
id=585
SELECT
TRIM(TRAILING
'[!--empirenews.page--]'
FROM
`newstext`)
AS
newstex
FROM
[!db.pre!]ecms_news_data_1
WHERE
id=585
mysql中trim()函数的用法去除左空格函数:
LTRIM(str)
mysql>SELECT LTRIM(' barbar')
->'barbar'
去除右空格函数:
RTRIM(str)
mysql>SELECT RTRIM('barbar ')
->'barbar'
过滤指定的字符串:
完整格式:TRIM([{BOTH | LEADING | TRAILING} [remstr] FROM] str)
简化格式:TRIM([remstr FROM] str)
mysql>SELECT TRIM(' bar ')-- 默认删除前后空格
->'bar' mysql>SELECT TRIM(LEADING ',' FROM ',,barxxx')-- 删除指定首字符 如','
->'barxxx' mysql>SELECT TRIM(BOTH ',' FROM ',,bar,,,')-- 删除指定首尾字符
->'bar' mysql>SELECT TRIM(TRAILING ',' FROM 'barxxyz,,')
->'barxxyz'
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