Remove all spaces from a string in SQL Server

Question

What is the best way to remove all spaces from a string in SQL Server 2008?

LTRIM(RTRIM(' a b ')) would remove all spaces at the right and left of the string, but I also need to remove the space in the middle.

Answer 1

Simply replace it;

SELECT REPLACE(fld_or_variable, ' ', '')

Edit: Just to clarify; its a global replace, there is no need to trim() or worry about multiple spaces for either char or 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 

Result

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

I would use a REPLACE

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

REPLACE

Answer 3

If it is an update on a table all you have to do is run this update multiple times until it is affecting 0 rows.

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

Answer 4

100% working

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

You can use "column_name" or column_name

Thanks

Subroto

Answer 5

REPLACE() function:

REPLACE(field, ' ', '')

Answer 6

Reference taken from this blog:

First, Create sample table and data:

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

Script to SELECT string without Extra Spaces:

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

Result:

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 7

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

replace(val, ' ', '')

Answer 8

This does the trick of removing the spaces on the strings:

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

Answer 9

If there are multiple white spaces in a string, then replace may not work correctly. For that, the following function should be used.

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

Example:

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

Output:

aaaaaaaaaa

Answer 10

Just in case you need to TRIM spaces in all columns, you could use this script to do it dynamically:

--Just change table name
declare @MyTable varchar(100)
set @MyTable = 'MyTable'

--temp table to get column names and a row id
select column_name, ROW_NUMBER() OVER(ORDER BY column_name) as id into #tempcols from INFORMATION_SCHEMA.COLUMNS 
WHERE   DATA_TYPE IN ('varchar', 'nvarchar') and TABLE_NAME = @MyTable

declare @tri int
select @tri = count(*) from #tempcols
declare @i int
select @i = 0
declare @trimmer nvarchar(max)
declare @comma varchar(1)
set @comma = ', '

--Build Update query
select @trimmer = 'UPDATE [dbo].[' + @MyTable + '] SET '

WHILE @i <= @tri 
BEGIN

    IF (@i = @tri)
        BEGIN
        set @comma = ''
        END
    SELECT  @trimmer = @trimmer + CHAR(10)+ '[' + COLUMN_NAME + '] = LTRIM(RTRIM([' + COLUMN_NAME + ']))'+@comma
    FROM    #tempcols
    where id = @i

    select @i = @i+1
END

--execute the entire query
EXEC sp_executesql @trimmer

drop table #tempcols

Answer 11

if you want to remove spaces,-, and another text from string then use following :

suppose you have a mobile number in your Table like '718-378-4957' or ' 7183784957' and you want replace and get the mobile number then use following Text.

select replace(replace(replace(replace(MobileNo,'-',''),'(',''),')',''),' ','') from EmployeeContactNumber

Result :-- 7183784957

Answer 12

Just a tip, in case you are having trouble with the replace function, you might have the datatype set to nchar (in which case it is a fixed length and it will not work).

Answer 13

To make all of the answers above complete, there are additional posts on StackOverflow on how to deal with ALL whitespace characters (see https://en.wikipedia.org/wiki/Whitespace_character for a full list of these characters):

• TSQL 2008 Using LTrim(RTrim and still have spaces in the data
• How do I remove non-breaking spaces from a column in SQL server?
• What's a good way to trim all whitespace characters from a string in T-SQL without UDF and without CLR?

Answer 14

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

Answer 15

this is useful for me:

CREATE FUNCTION dbo.TRIM(@String VARCHAR(MAX))
RETURNS VARCHAR(MAX)
BEGIN
    RETURN LTRIM(RTRIM(REPLACE(REPLACE(REPLACE(REPLACE(REPLACE(REPLACE(@String,CHAR(10),'[]'),CHAR(13),'[]'),char(9),'[]'),CHAR(32),'[]'),'][',''),'[]',CHAR(32))));
END
GO

.

Answer 16

I had this issue today and replace / trim did the trick..see below.

update table_foo 
set column_bar  = REPLACE(LTRIM(RTRIM(column_bar)), '  ', '')

before and after :

old-bad:  column_bar    |   New-fixed:   column_bar
       '  xyz  '        |                'xyz'   
       '  xyz  '        |                'xyz' 
       '  xyz  '        |                'xyz' 
       '  xyz  '        |                'xyz' 
       '  xyz  '        |                'xyz' 
       '  xyz  '        |                'xyz' 

Answer 17

Check and Try the below script (Unit Tested)-

--Declaring
DECLARE @Tbl TABLE(col_1 VARCHAR(100));

--Test Samples
INSERT INTO @Tbl (col_1)
VALUES
('  EY     y            
Salem')
, ('  EY     P    ort       Chennai   ')
, ('  EY     Old           Park   ')
, ('  EY   ')
, ('  EY   ')
,(''),(null),('d                           
    f');

SELECT col_1 AS INPUT,
    LTRIM(RTRIM(
    REPLACE(
    REPLACE(
    REPLACE(
    REPLACE(
    REPLACE(
        REPLACE(
        REPLACE(
        REPLACE(
        REPLACE(
        REPLACE(
        REPLACE(col_1,CHAR(10),' ')
        ,CHAR(11),' ')
        ,CHAR(12),' ')
        ,CHAR(13),' ')
        ,CHAR(14),' ')
        ,CHAR(160),' ')
        ,CHAR(13)+CHAR(10),' ')
    ,CHAR(9),' ')
    ,' ',CHAR(17)+CHAR(18))
    ,CHAR(18)+CHAR(17),'')
    ,CHAR(17)+CHAR(18),' ')
    )) AS [OUTPUT]
FROM @Tbl;

Answer 18

Try to use like this, if normal spaces are not removed by LTRM or RTRM

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

Answer 19

To remove the spaces in a string left and right. To remove space in middle use Replace.

You can use RTRIM() to remove spaces from the right and LTRIM() to remove spaces from the left hence left and right spaces removed as follows:

SELECT * FROM table WHERE LTRIM(RTRIM(username)) = LTRIM(RTRIM("Bob alias baby"))

Answer 20

Syntax for replacing a specific characters:

REPLACE ( string_expression , string_pattern , string_replacement )  

For example in the string "HelloReplaceThingsGoing" Replace word is replaced by How

SELECT REPLACE('HelloReplaceThingsGoing','Replace','How');
GO

Answer 21

A functional version (udf) that removes spaces, cr, lf, tabs or configurable.

select Common.ufn_RemoveWhitespace(' 234   asdf   wefwef 3  x   ', default) as S

Result: '234asdfwefwef3x'

alter function Common.RemoveWhitespace
(
    @pString nvarchar(max),
    @pWhitespaceCharsOpt nvarchar(max) = null -- default: tab, lf, cr, space 
)  
returns nvarchar(max) as
/*--------------------------------------------------------------------------------------------------
    Purpose:   Compress whitespace

    Example:  select Common.ufn_RemoveWhitespace(' 234   asdf   wefwef 3  x   ', default) as s 
              -- Result: 234asdfwefwef3x

    Modified    By          Description
    ----------  ----------- --------------------------------------------------------------------
    2018.07.24  crokusek    Initial Version 
  --------------------------------------------------------------------------------------------------*/ 
begin    
    declare 
        @maxLen bigint = 1073741823, -- (2^31 - 1) / 2 (https://stackoverflow.com/a/4270085/538763)
        @whitespaceChars nvarchar(30) = coalesce(
            @pWhitespaceCharsOpt, 
            char(9) + char(10) + char(13) + char(32));  -- tab, lf, cr, space

    declare
        @whitespacePattern nvarchar(30) = '%[' + @whitespaceChars + ']%',
        @nonWhitespacePattern nvarchar(30) = '%[^' + @whitespaceChars + ']%',
        @previousString nvarchar(max) = '';

    while (@pString != @previousString)
    begin
        set @previousString = @pString;

        declare
            @whiteIndex int = patindex(@whitespacePattern, @pString);

        if (@whiteIndex > 0)
        begin                   
            declare 
                @whitespaceLength int = nullif(patindex(@nonWhitespacePattern, substring(@pString, @whiteIndex, @maxLen)), 0) - 1;                

            set @pString = 
                substring(@pString, 1, @whiteIndex - 1) + 
                iif(@whiteSpaceLength > 0, substring(@pString, @whiteIndex + @whiteSpaceLength, @maxLen), '');
        end        
    end        
    return @pString;
end
go

Answer 22

For some reason, the replace works only with one string each time. I had a string like this "Test           MSP" and I want to leave only one space.

I used the approach that @Farhan did, but with some modifications:

CREATE FUNCTION ReplaceAll
(
    @OriginalString varchar(8000),
    @StringToRemove varchar(20),
    @StringToPutInPlace varchar(20)
)
RETURNS varchar(8000)
AS
BEGIN
declare @ResultStr varchar(8000)
set @ResultStr = @OriginalString
while charindex(@StringToRemove, @ResultStr) > 0
    set @ResultStr = replace(@ResultStr, @StringToRemove, @StringToPutInPlace)

return @ResultStr
END

Then I run my update like this

UPDATE tbTest SET Description = dbo.ReplaceAll(Description, '  ', ' ') WHERE ID = 14225

Then I got this result: Test MSP

Posting here if in case someone needs it as I did.

Running on: Microsoft SQL Server 2016 (SP2)

Answer 23

It seems that everybody keeps referring to a single REPLACE function. Or even many calls of a REPLACE function. But when you have dynamic output with an unknown number of spaces, it wont work. Anybody that deals with this issue on a regular basis knows that REPLACE will only remove a single space, NOT ALL, as it should. And LTRIM and RTRIM seem to have the same issue. Leave it to Microsoft. Here's a sample output that uses a WHILE Loop to remove ALL CHAR(32) values (space).

DECLARE @INPUT_VAL  VARCHAR(8000)
DECLARE @OUTPUT_VAL VARCHAR(8000)

SET @INPUT_VAL = '      C               A                         '
SET @OUTPUT_VAL = @INPUT_VAL
WHILE CHARINDEX(CHAR(32), @OUTPUT_VAL) > 0 BEGIN
    SET @OUTPUT_VAL = REPLACE(@INPUT_VAL, CHAR(32), '')
END

PRINT 'START:' + @INPUT_VAL + ':END'
PRINT 'START:' + @OUTPUT_VAL + ':END'

Here's the output of the above code:

START:      C               A                         :END
START:CA:END

Now to take it a step further and utilize it in an UPDATE or SELECT statement, change it to a udf.

CREATE FUNCTION udf_RemoveSpaces (@INPUT_VAL    VARCHAR(8000))
RETURNS VARCHAR(8000)
AS 
BEGIN

DECLARE @OUTPUT_VAL VARCHAR(8000)
SET @OUTPUT_VAL = @INPUT_VAL
-- ITTERATE THROUGH STRING TO LOOK FOR THE ASCII VALUE OF SPACE (CHAR(32)) REPLACE IT WITH BLANK, NOT NULL
WHILE CHARINDEX(CHAR(32), @OUTPUT_VAL) > 0 BEGIN
    SET @OUTPUT_VAL = REPLACE(@INPUT_VAL, CHAR(32), '')
END

RETURN @OUTPUT_VAL
END

Then utilize the function in a SELECT or INSERT statement:

UPDATE A
SET STATUS_REASON_CODE = WHATEVER.dbo.udf_RemoveSpaces(STATUS_REASON_CODE)
FROM WHATEVER..ACCT_INFO A
WHERE A.SOMEVALUE = @SOMEVALUE

INSERT INTO SOMETABLE
(STATUS_REASON_CODE)
SELECT WHATEVER.dbo.udf_RemoveSpaces(STATUS_REASON_CODE)
FROM WHATEVER..ACCT_INFO A
WHERE A.SOMEVALUE = @SOMEVALUE