从SQL Server中的字符串中删除所有空格

Question

在SQL Server 2008中从字符串中删除所有空格的最佳方法是什么？

LTRIM(RTRIM(' a b ')) 将删除字符串右侧和左侧的所有空格,但我还需要删除中间的空格.

Answer 1

只需更换它;

SELECT REPLACE(fld_or_variable, ' ', '')

编辑: 只是为了澄清; 它是一个全球替代品,不需要trim()或担心多个空间char或varchar:

create table #t (
    c char(8),
    v varchar(8))

insert #t (c, v) values 
    ('a a'    , 'a a'    ),
    ('a a  '  , 'a a  '  ),
    ('  a a'  , '  a a'  ),
    ('  a a  ', '  a a  ')

select
    '"' + c + '"' [IN], '"' + replace(c, ' ', '') + '"' [OUT]
from #t  
union all select
    '"' + v + '"', '"' + replace(v, ' ', '') + '"'
from #t 

结果

IN             OUT
===================
"a a     "     "aa"
"a a     "     "aa"
"  a a   "     "aa"
"  a a   "     "aa"
"a a"          "aa"
"a a  "        "aa"
"  a a"        "aa"
"  a a  "      "aa"

Answer 2

我会用REPLACE

select REPLACE (' Hello , How Are You ?', ' ', '' )

更换

Answer 3

如果它是对表的更新,您只需多次运行此更新,直到它影响0行.

update tableName
set colName = REPLACE(LTRIM(RTRIM(colName)), '  ', ' ')
where colName like '%  %'

Answer 4

REPLACE()功能:

REPLACE(field, ' ', '')

Answer 5

从这篇博客中摘录:

首先,创建样本表和数据:

CREATE TABLE tbl_RemoveExtraSpaces
(
     Rno INT
     ,Name VARCHAR(100)
)
GO

INSERT INTO tbl_RemoveExtraSpaces VALUES (1,'I    am     Anvesh   Patel')
INSERT INTO tbl_RemoveExtraSpaces VALUES (2,'Database   Research and     Development  ')
INSERT INTO tbl_RemoveExtraSpaces VALUES (3,'Database    Administrator     ')
INSERT INTO tbl_RemoveExtraSpaces VALUES (4,'Learning    BIGDATA    and       NOSQL ')
GO

没有额外空格的SELECT字符串脚本:

SELECT
     [Rno]
    ,[Name] AS StringWithSpace
    ,LTRIM(RTRIM(REPLACE(REPLACE(REPLACE([Name],CHAR(32),'()'),')(',''),'()',CHAR(32)))) AS StringWithoutSpace
FROM tbl_RemoveExtraSpaces

结果:

Rno         StringWithSpace                                 StringWithoutSpace
----------- -----------------------------------------  ---------------------------------------------
1           I    am     Anvesh   Patel                      I am Anvesh Patel
2           Database   Research and     Development         Database Research and Development
3           Database    Administrator                       Database Administrator
4           Learning    BIGDATA    and       NOSQL          Learning BIGDATA and NOSQL

Answer 6

100%工作

UPDATE table_name SET  "column_name"=replace("column_name", ' ', ''); //Remove white space

UPDATE table_name SET  "column_name"=replace("column_name", '\n', ''); //Remove newline

UPDATE table_name SET  "column_name"=replace("column_name", '\t', ''); //Remove all tab

你可以使用"column_name"或column_name

谢谢

Subroto

Answer 7

replace(replace(column_Name,CHAR(13),''),CHAR(10),'')

Answer 8

t-sql取代了http://msdn.microsoft.com/en-us/library/ms186862.aspx

替换(val,'','')

Answer 9

如果 LTRM 或 RTRM 没有删除正常空格，请尝试这样使用

LTRIM(RTRIM(REPLACE(REPLACE(REPLACE(Column_data, CHAR(9), ''), CHAR(10), ''), CHAR(13), '')))

Answer 10

如果字符串中有多个空格，则替换可能无法正常工作。为此，应使用以下功能。

CREATE FUNCTION RemoveAllSpaces
(
    @InputStr varchar(8000)
)
RETURNS varchar(8000)
AS
BEGIN
declare @ResultStr varchar(8000)
set @ResultStr = @InputStr
while charindex(' ', @ResultStr) > 0
    set @ResultStr = replace(@InputStr, ' ', '')

return @ResultStr
END

例：

select dbo.RemoveAllSpaces('aa  aaa       aa aa                 a')

输出：

aaaaaaaaaa

Answer 11

这可以消除字符串上的空格：

UPDATE
    tablename
SET
    columnname = replace(columnname, ' ', '');